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    tytee12's Avatar
    tytee12 Posts: 1, Reputation: 1
    New Member
     
    #1

    Mar 28, 2007, 07:36 PM
    probability?
    If 40% of the community goes to the car wash, find thes probabilitites for a sample of 13 people:

    Exactly 7 people go to the car wash.

    At most 8 people go to the car wash

    At least 6 people go to the car wash.

    Less than 5 people go to the car wash.
    worthbeads's Avatar
    worthbeads Posts: 538, Reputation: 45
    Senior Member
     
    #2

    Mar 28, 2007, 07:59 PM
    Can you rephrase the question please.
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #3

    Mar 28, 2007, 11:46 PM
    Yes, your question makes no sense, you're saying that exactly 0.40 percent go to the carwash, so out of 13 people, 5.2 will go to the car wash.

    So exactly 7 has a probability of 0
    8 or less has a probability of 1
    6 or more has a probability of 0
    less than 5 has a probability of 0.

    Do you see how the question doesn't make sense?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
     
    #4

    Mar 29, 2007, 04:35 AM
    This is classic binomial probability:

    a.

    b.

    c.

    d.

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