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 one year ago
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
 one year ago
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

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dan815
 one year ago
Best ResponseYou've already chosen the best response.0or in other words what is the probability when no TA gets 5 heads

dan815
 one year ago
Best ResponseYou've already chosen the best response.0@FibonacciChick666 help us with this

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0k so lets make a chart with the outcomes

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0strike that cause it will take forever ok what is the probability that 1 TA will get exactly 5 heads?

dan815
 one year ago
Best ResponseYou've already chosen the best response.0im thinking its like this for 1 TA

dan815
 one year ago
Best ResponseYou've already chosen the best response.0i dunno im kinda confused about this whole thing

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0hmm let me think.... ughh I'm so annoyed we did this in 6th grade why can't I remember...

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0at least not all 3 duh ok

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0ok so you would think that it would be more likely right

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0but coins are weird because the prob for hhhhhh= prob for tthhtt

dan815
 one year ago
Best ResponseYou've already chosen the best response.0for 1 TA getting 5 heads

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0i'm thinking \[the~probability~for~1~TA~is~ (\frac{1}{2})^5\]because they have to be in a row

dan815
 one year ago
Best ResponseYou've already chosen the best response.0but it says they just need to get 5 outta 10

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0oh shoot hmm well that would be one half to the 10th that tells us the total combinations

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0then we take out anything that has more than 4 tails

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0but we need permutations don't we

dan815
 one year ago
Best ResponseYou've already chosen the best response.0i think u are right (1/2)^5 for 1 TA

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0if 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?

dan815
 one year ago
Best ResponseYou've already chosen the best response.0that (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]

dan815
 one year ago
Best ResponseYou've already chosen the best response.0yeah all probability gotta equal 1

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0can't equal one

dan815
 one year ago
Best ResponseYou've already chosen the best response.0im not sure though if the probability shud be 1/2^5

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0neither am I let me call in @hero

dan815
 one year ago
Best ResponseYou've already chosen the best response.0does that look right for a dice if that is right then i guess u can just use that way for the coin too

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0ok... hmm that looks right but i'm just not sure it's been so long since i've taken prob and stats

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0you need to learn to write in LaTex...

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0http://openstudy.com/study#/groups/LaTeX%20Practicing!%20%3A) you can learn it here

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0but pretty much \[you~write~like~this~for~math~stuff~~~~~~~~~~[\frac{1}{2}]^5\\]

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0\[you~write~like~this~for~math~stuff~~~~~~~~~~[\frac{1}{2}]^5\]

dan815
 one year ago
Best ResponseYou've already chosen the best response.0do you just type that out or use Equation button down there

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0it is a free program for writing in math

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0but that is the same as using the eq button down there

dan815
 one year ago
Best ResponseYou've already chosen the best response.0hbey I THINK I GOT IT NOW

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0the answer cant be one...

dan815
 one year ago
Best ResponseYou've already chosen the best response.0no mean 1  whatever that is equal to is our answer

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0ohhhhh uhm maybe i honestly stopped thinking about it

dan815
 one year ago
Best ResponseYou've already chosen the best response.0i think iam addicted to these questions, i cant stop till i solve when someone asks these questions lol its gonna bug me for ever

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0i know but it's 3 am here...

dan815
 one year ago
Best ResponseYou've already chosen the best response.0so are u on summer vacaation yet

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0yep :) for 2 weeks then summer classes you?

dan815
 one year ago
Best ResponseYou've already chosen the best response.0nice, i got time till summer classes, my summer classes is in 2nd term of summer dunno when that is

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0lucky i have like 28 credits over the summer :/

dan815
 one year ago
Best ResponseYou've already chosen the best response.0wow u took way too much in summer lol

dan815
 one year ago
Best ResponseYou've already chosen the best response.0how are u gonna keep up! is ur summer term as long as the regular term

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0uhm kind of.... i'm not sure though cause i also work like 35 hours a week

dan815
 one year ago
Best ResponseYou've already chosen the best response.0i dont think id be able to do it, unless its like all electives

dan815
 one year ago
Best ResponseYou've already chosen the best response.0even then its gotta be some super easy BS on exam electives

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0i have PDE, single variable calc proofs, a linguistics intro course, an art class, cog. psych, and more that i forget lol

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0ohhh yea should be fun

dan815
 one year ago
Best ResponseYou've already chosen the best response.0we did some PDE toward the end of this year but i dont think its like indepth as ur PDE class

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0yep haha and in the fall i have abstract algebra, ODE, topology or something (math elective) ASL 3 uhmmmand something else haha

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0and prob not this class is going to suck massively

dan815
 one year ago
Best ResponseYou've already chosen the best response.0its gonna be like that Heat equation wave equation and laplace right then using fourier series to solve?

dan815
 one year ago
Best ResponseYou've already chosen the best response.0thats as far as we got, just doing simple boundary value problems with that

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0... were you following me on here tonight? lol

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0i just answered a PDE on here earlier lol

dan815
 one year ago
Best ResponseYou've already chosen the best response.0i just had to cram all that stuff for my exam a couple days ago T_T

dan815
 one year ago
Best ResponseYou've already chosen the best response.0it 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

dan815
 one year ago
Best ResponseYou've already chosen the best response.0but she gave me this huge LECTURE ON stick it out, just believe GOD

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0I had linear algebra personally but that sounds dreadful which class?

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0...math gods?

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0I know I usually pray to bolzano or laplace hbu? haha

dan815
 one year ago
Best ResponseYou've already chosen the best response.0lmao, just Jesus for me :)

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0ok if that works for ya haha

dan815
 one year ago
Best ResponseYou've already chosen the best response.0it dooess!! we seen too much to not believe in god

dan815
 one year ago
Best ResponseYou've already chosen the best response.0i 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

dan815
 one year ago
Best ResponseYou've already chosen the best response.0like 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

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0thats cool for you and i'm happy you are no longer an addict

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0i am still a firm believer in skepticism however

dan815
 one year ago
Best ResponseYou've already chosen the best response.0haha thats fine, i wud have never believed it till it finally happened to me

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0I was raised wayyyy too catholic, then I started thinking on my own and yep. that is how i am where i am now

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0but 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

dan815
 one year ago
Best ResponseYou've already chosen the best response.0okay good night sleep well :)

FibonacciChick666
 one year ago
Best ResponseYou've already chosen the best response.0Night! and you too!

dan815
 one year ago
Best ResponseYou've already chosen the best response.0saying good night is a very touchy time i feel

NadiaKamal
 one year ago
Best ResponseYou've already chosen the best response.2HEY THIS IS THE RIGHT ANSWER

NadiaKamal
 one year ago
Best ResponseYou've already chosen the best response.2he 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=10.2461=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 =10.4285 which is 0.5715

dan815
 one year ago
Best ResponseYou've already chosen the best response.0that 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
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