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

yashar806

The manager of a gas station and convenience store tabulates the following facts: 40% of customers purchase gasoline (G). 36% of customers purchase cigarettes (C). 61% of customers purchase gasoline or a drink (D). 9% of customers purchase gasoline and cigarettes. 14% of customers purchase a gasoline and a drink. 15% of customers purchase cigarettes and a drink. 2% of customers purchase all three items. (a) If we randomly select a customer, what is the probability that she purchases gasoline or cigarettes? (b) If we randomly select a customer, what is the probability that

  • one year ago
  • one year ago

  • This Question is Closed
  1. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    P(A or B) = P(A)+ P(B)-P(A and B) here, A = gasoline, B =cigarette

    • one year ago
  2. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    you know all 3, P(A),P(B),P(A and B) just plug in values!

    • one year ago
  3. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    0.04+0.36-?

    • one year ago
  4. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    40% = 0.4 and P(G and C) is given as % = 0.09

    • one year ago
  5. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    9%

    • one year ago
  6. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    what about P(A and B)

    • one year ago
  7. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    oh I got it

    • one year ago
  8. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    what you got as final answer ?

    • one year ago
  9. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    what about b ?

    • one year ago
  10. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    complete question ?

    • one year ago
  11. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    i got 0.67

    • one year ago
  12. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    is that right?

    • one year ago
  13. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    lets check, P(G or C) = 0.4+0.36-0.09 = 0.76-0.09 = 0.67 yes, you are correct :)

    • one year ago
  14. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    what about b?

    • one year ago
  15. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    you haven't posted question for b

    • one year ago
  16. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    If we randomly select a customer, what is the probability that she purchases a drink

    • one year ago
  17. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry

    • one year ago
  18. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    ?

    • one year ago
  19. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    can you make a venn diagram for your question ?

    • one year ago
  20. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    can you give me some idea?

    • one year ago
  21. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1362261956915:dw|

    • one year ago
  22. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    yes^ from that can you find probability of drink ? just add all the values in D circle.

    • one year ago
  23. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 1

    Makes you wonder what the last 25% are doing. Using the washroom or casing the joint.

    • one year ago
  24. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    0.35?

    • one year ago
  25. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 1

    That looks good to me.

    • one year ago
  26. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    correct :)

    • one year ago
  27. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    awesome

    • one year ago
  28. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    t more quick questions

    • one year ago
  29. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    Which of the following statements is true? G and D are independent. G and C are independent. C and D are independent. None of the three pairs of events are independent.

    • one year ago
  30. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 1

    You might want to go over how to do that diagram. That's a fundamental skill for these types of questions.

    • one year ago
  31. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    ok thanks

    • one year ago
  32. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    (d) Which of the following statements is true? C and D are mutually exclusive. G and D are mutually exclusive. G and C are mutually exclusive. None of the three pairs of events are mutually exclusive.

    • one year ago
  33. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    mutually exclusive events have intersection = 0 or if P(A and B)=0, then A, B are mutually exclusive.

    • one year ago
  34. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    so, do you find any such pair here ?

    • one year ago
  35. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    G and D are mutually exclusive.

    • one year ago
  36. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    ?

    • one year ago
  37. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    G and D = 12+2 , its not 0

    • one year ago
  38. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    None of the three pairs of events are mutually exclusive.

    • one year ago
  39. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    yeah.

    • one year ago
  40. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    what about the previous one about independent?

    • one year ago
  41. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    for independent , P(A and B) = P(A)*P(B) so, you need to check this for all 3 pairs.

    • one year ago
  42. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    pg and pd , i got 0.14

    • one year ago
  43. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    how ?

    • one year ago
  44. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    P(G or D)=0.61

    • one year ago
  45. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    Pg is 0.4

    • one year ago
  46. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    14% of customers purchase a gasoline and a drink P(g and d)so it;s going to be 0.14

    • one year ago
  47. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    'or' ?? you need to use 'and'

    • one year ago
  48. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    P(g and d)so it;s going to be 0.14 is correct

    • one year ago
  49. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    so?

    • one year ago
  50. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    G and C we have 0.65

    • one year ago
  51. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    is that = p(g)*p(d) ??

    • one year ago
  52. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    oh no

    • one year ago
  53. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    then G and D are not independent.

    • one year ago
  54. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    0.144?

    • one year ago
  55. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    similar check for other 2 pairs.

    • one year ago
  56. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    why they are not independent?

    • one year ago
  57. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    0.216

    • one year ago
  58. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    so None of the three pairs of events are independent.

    • one year ago
  59. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    yeah

    • one year ago
  60. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    ok last question, i actually got the answer could you help me to check it?

    • one year ago
  61. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    yes?

    • one year ago
  62. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    What is P(C Dc), i.e., the probability that a randomly selected customer purchases cigarettes but not a drink?

    • one year ago
  63. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    i got 0.21

    • one year ago
  64. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    correct :)

    • one year ago
  65. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you very much?

    • one year ago
  66. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    welcome?

    • one year ago
  67. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    wait

    • one year ago
  68. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    for this part

    • one year ago
  69. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    Which of the following statements is true? G and D are independent. G and C are independent. C and D are independent. None of the three pairs of events are independent.

    • one year ago
  70. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    answer is not None of the three pairs of events are independent

    • one year ago
  71. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    ?

    • one year ago
  72. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    i didn't calculate for all 3, but looking at numbers, i think its None...

    • one year ago
  73. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah, but its not.

    • one year ago
  74. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    can you help me to check it please?

    • one year ago
  75. hartnn
    Best Response
    You've already chosen the best response.
    Medals 3

    i still get none :( lets have a 2nd opinion by @tcarroll010

    • one year ago
  76. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    help me on this one

    • one year ago
  77. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    Which of the following statements is true? G and D are independent. G and C are independent. C and D are independent. None of the three pairs of events are independent.

    • one year ago
  78. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    im not sure, what are independent

    • one year ago
  79. Mertsj
    Best Response
    You've already chosen the best response.
    Medals 0

    Independent means that the occurrence of one does not affect the probability of the other.

    • one year ago
  80. Mertsj
    Best Response
    You've already chosen the best response.
    Medals 0

    Is there just one answer?

    • one year ago
  81. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    in this one, what are independent

    • one year ago
  82. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah, they are multiple choice

    • one year ago
  83. Mertsj
    Best Response
    You've already chosen the best response.
    Medals 0

    Then I guess I would choose G and C

    • one year ago
  84. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    why?

    • one year ago
  85. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    can you explain it?

    • one year ago
  86. Mertsj
    Best Response
    You've already chosen the best response.
    Medals 0

    Because I can't see how one affects the other.

    • one year ago
  87. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    answer is wrong

    • one year ago
  88. Mertsj
    Best Response
    You've already chosen the best response.
    Medals 0

    Do you get another chance?

    • one year ago
  89. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    yes last chance

    • one year ago
  90. Mertsj
    Best Response
    You've already chosen the best response.
    Medals 0

    And you already tried "none"?

    • one year ago
  91. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

    • one year ago
  92. Mertsj
    Best Response
    You've already chosen the best response.
    Medals 0

    So it's a 50-50 chance. Let's see if we can pick out any difference in the two remaining choices.

    • one year ago
  93. Mertsj
    Best Response
    You've already chosen the best response.
    Medals 0

    C & D don't mention the same commodity. If I had to guess, (and I would be guessing) that's what I would put.

    • one year ago
  94. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    my queststion is this

    • one year ago
  95. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    Which of the following statements is true? G and D are independent. G and C are independent. C and D are independent. None of the three pairs of events are independent

    • one year ago
  96. yashar806
    Best Response
    You've already chosen the best response.
    Medals 0

    cuz , we are not sure

    • one year ago
  97. bambimonster
    Best Response
    You've already chosen the best response.
    Medals 0

    Hey so what did u get in the end? Is it c and d

    • 8 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.