Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Khlara

A class has 3 Teaching Assistants (TAs). Each TA tosses a coin 10 times. Find the chance that at least one of the TAs gets exactly 5 heads. unanswered

  • 11 months ago
  • 11 months ago

  • This Question is Closed
  1. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    or in other words what is the probability when no TA gets 5 heads

    • 11 months ago
  2. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    @FibonacciChick666 help us with this

    • 11 months ago
  3. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    k so lets make a chart with the outcomes

    • 11 months ago
  4. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    strike that cause it will take forever ok what is the probability that 1 TA will get exactly 5 heads?

    • 11 months ago
  5. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    im thinking its like this for 1 TA

    • 11 months ago
  6. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    i dunno im kinda confused about this whole thing

    • 11 months ago
  7. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    hmm let me think.... ughh I'm so annoyed we did this in 6th grade why can't I remember...

    • 11 months ago
  8. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    at least not all 3 duh ok

    • 11 months ago
  9. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so you would think that it would be more likely right

    • 11 months ago
  10. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    hmm

    • 11 months ago
  11. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    but coins are weird because the prob for hhhhhh= prob for tthhtt

    • 11 months ago
  12. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    is itt like this

    • 11 months ago
  13. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    for 1 TA getting 5 heads

    • 11 months ago
  14. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1367217339549:dw|

    • 11 months ago
  15. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    i'm thinking \[the~probability~for~1~TA~is~ (\frac{1}{2})^5\]because they have to be in a row

    • 11 months ago
  16. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    but it says they just need to get 5 outta 10

    • 11 months ago
  17. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    oh shoot hmm well that would be one half to the 10th that tells us the total combinations

    • 11 months ago
  18. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    then we take out anything that has more than 4 tails

    • 11 months ago
  19. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    5*

    • 11 months ago
  20. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    but we need permutations don't we

    • 11 months ago
  21. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    i think u are right (1/2)^5 for 1 TA

    • 11 months ago
  22. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    if that is right then if we cubed it that would be for all three to get it but if we added them that would be for 1 right?

    • 11 months ago
  23. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    that (1/2)^5 * 3 for 1 of the 3 having 5 heads gotta add the probability of 2 of them getting 5 heads and 3 getting 5 heads so + [(1/2^5)^2] *3 + [(1/2^5)^3]

    • 11 months ago
  24. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah all probability gotta equal 1

    • 11 months ago
  25. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    can't equal one

    • 11 months ago
  26. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    im not sure though if the probability shud be 1/2^5

    • 11 months ago
  27. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    neither am I let me call in @hero

    • 11 months ago
  28. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    does that look right for a dice if that is right then i guess u can just use that way for the coin too

    • 11 months ago
  29. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    ok... hmm that looks right but i'm just not sure it's been so long since i've taken prob and stats

    • 11 months ago
  30. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    you need to learn to write in LaTex...

    • 11 months ago
  31. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    what is that

    • 11 months ago
  32. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    http://openstudy.com/study#/groups/LaTeX%20Practicing!%20%3A) you can learn it here

    • 11 months ago
  33. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    but pretty much \[you~write~like~this~for~math~stuff~~~~~~~~~~[\frac{1}{2}]^5\\]

    • 11 months ago
  34. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    \[you~write~like~this~for~math~stuff~~~~~~~~~~[\frac{1}{2}]^5\]

    • 11 months ago
  35. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    do you just type that out or use Equation button down there

    • 11 months ago
  36. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    type it out

    • 11 months ago
  37. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    o wow lol

    • 11 months ago
  38. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    it is a free program for writing in math

    • 11 months ago
  39. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    but that is the same as using the eq button down there

    • 11 months ago
  40. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    hbey I THINK I GOT IT NOW

    • 11 months ago
  41. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    sweet

    • 11 months ago
  42. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1367219586841:dw|

    • 11 months ago
  43. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    the answer cant be one...

    • 11 months ago
  44. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1367219732506:dw|

    • 11 months ago
  45. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    no mean 1 - whatever that is equal to is our answer

    • 11 months ago
  46. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    ohhhhh uhm maybe i honestly stopped thinking about it

    • 11 months ago
  47. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    i think iam addicted to these questions, i cant stop till i solve when someone asks these questions lol its gonna bug me for ever

    • 11 months ago
  48. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    i know but it's 3 am here...

    • 11 months ago
  49. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    so are u on summer vacaation yet

    • 11 months ago
  50. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    yep :) for 2 weeks then summer classes you?

    • 11 months ago
  51. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    nice, i got time till summer classes, my summer classes is in 2nd term of summer dunno when that is

    • 11 months ago
  52. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    lucky i have like 28 credits over the summer :/

    • 11 months ago
  53. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    wow u took way too much in summer lol

    • 11 months ago
  54. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    how are u gonna keep up! is ur summer term as long as the regular term

    • 11 months ago
  55. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    uhm kind of.... i'm not sure though cause i also work like 35 hours a week

    • 11 months ago
  56. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    i dont think id be able to do it, unless its like all electives

    • 11 months ago
  57. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    even then its gotta be some super easy BS on exam electives

    • 11 months ago
  58. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    i have PDE, single variable calc proofs, a linguistics intro course, an art class, cog. psych, and more that i forget lol

    • 11 months ago
  59. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    oo PDE :)

    • 11 months ago
  60. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    MATH MAJOR

    • 11 months ago
  61. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    ohhh yea should be fun

    • 11 months ago
  62. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    we did some PDE toward the end of this year but i dont think its like indepth as ur PDE class

    • 11 months ago
  63. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    yep haha and in the fall i have abstract algebra, ODE, topology or something (math elective) ASL 3 uhmmmand something else haha

    • 11 months ago
  64. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    and prob not this class is going to suck massively

    • 11 months ago
  65. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    its gonna be like that Heat equation wave equation and laplace right then using fourier series to solve?

    • 11 months ago
  66. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    thats as far as we got, just doing simple boundary value problems with that

    • 11 months ago
  67. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    ... were you following me on here tonight? lol

    • 11 months ago
  68. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    whaatt do u mean

    • 11 months ago
  69. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    i just answered a PDE on here earlier lol

    • 11 months ago
  70. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    oh haha

    • 11 months ago
  71. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    i just had to cram all that stuff for my exam a couple days ago T_T

    • 11 months ago
  72. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    yucky

    • 11 months ago
  73. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    it was a feather trying to learn fourier series and PDE in 2 days, I was actually gonna give up on the exam.. i went to my mom and was like NO MORE!! I WILL take this in summer

    • 11 months ago
  74. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    but she gave me this huge LECTURE ON stick it out, just believe GOD

    • 11 months ago
  75. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    I had linear algebra personally but that sounds dreadful which class?

    • 11 months ago
  76. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    ...math gods?

    • 11 months ago
  77. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    lol

    • 11 months ago
  78. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    I know I usually pray to bolzano or laplace hbu? haha

    • 11 months ago
  79. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    lmao, just Jesus for me :)

    • 11 months ago
  80. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    ok if that works for ya haha

    • 11 months ago
  81. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    it dooess!! we seen too much to not believe in god

    • 11 months ago
  82. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    i actually used to be a drug addict and stuff, till I heard God, and my addictions everything even coffee addiction i dunno how lol, just went away over night

    • 11 months ago
  83. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    like my addictions were really really bad, i cudnt control it i cudnt get throught out a day if i wasnt high, not even 5 - 10 mins xD

    • 11 months ago
  84. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    thats cool for you and i'm happy you are no longer an addict

    • 11 months ago
  85. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    yep :)

    • 11 months ago
  86. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    i am still a firm believer in skepticism however

    • 11 months ago
  87. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    haha thats fine, i wud have never believed it till it finally happened to me

    • 11 months ago
  88. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    I was raised wayyyy too catholic, then I started thinking on my own and yep. that is how i am where i am now

    • 11 months ago
  89. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    thats cool

    • 11 months ago
  90. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    but oh well, differences aside i think i'm heading to sleep/work so i'll talk to ya again soon and I'll answer this later today when I've slept a little haha

    • 11 months ago
  91. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    okay good night sleep well :)

    • 11 months ago
  92. FibonacciChick666
    Best Response
    You've already chosen the best response.
    Medals 0

    Night! and you too!

    • 11 months ago
  93. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    love you lol..

    • 11 months ago
  94. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    saying good night is a very touchy time i feel

    • 11 months ago
  95. NadiaKamal
    Best Response
    You've already chosen the best response.
    Medals 2

    HEY THIS IS THE RIGHT ANSWER

    • 11 months ago
  96. NadiaKamal
    Best Response
    You've already chosen the best response.
    Medals 2

    he probability of getting 5 heads in 10 tosses =10C5(1/2^5)(1/2^5)=252/1024=0.2461.SIMILARLY the probability of not getting five heads=1-0.2461=0.7539. now the probability of three students not getting 5 heads =(0.7539)^3=0.4285 so at last the probability of atleast one student get exactly five heads =1-0.4285 which is 0.5715

    • 11 months ago
  97. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    @NadiaKamal :)

    • 11 months ago
  98. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1367222891831:dw|

    • 11 months ago
  99. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1367222963861:dw|

    • 11 months ago
  100. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    that is the probability for 1 TA getting 5 outta 10 flips as heads so for atleast 1, or otherwise, inpreted as when none of the TAs get 5 outta 10 = 1-(10 choose 5/2^10) ^3= prob of all 3 TA not getting 5 in a row so 1- prob of all 3 TA not getting 5 in a row = answer

    • 11 months ago
  101. KABRIC
    Best Response
    You've already chosen the best response.
    Medals 0

    THX

    • 11 months ago
  102. KABRIC
    Best Response
    You've already chosen the best response.
    Medals 0

    BOTH NADIA AND DAN THX

    • 11 months ago
  103. dan815
    Best Response
    You've already chosen the best response.
    Medals 0

    YW:)

    • 11 months ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.