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    basirou's Avatar
    basirou Posts: 12, Reputation: 1
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    #1

    Sep 3, 2010, 04:53 AM
    A box contains 18 tennis balls, of which eight are new. Suppose that three balls are
    A box contains 18 tennis balls, of which eight are new. Suppose that three balls are selected randomly, played with, and after play are returned to the box. If another three balls are selected for play a second time, what is the probability that they are all new?
    ScottGem's Avatar
    ScottGem Posts: 64,966, Reputation: 6056
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    #2

    Sep 3, 2010, 05:00 AM

    Please review the rules on asking homework questions. We do not do your homework for you.
    basirou's Avatar
    basirou Posts: 12, Reputation: 1
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    #3

    Sep 3, 2010, 06:34 AM
    Please i need your help
    A box contains 18 tennis balls, of which eight are new. Suppose that three balls are selected randomly, played with, and after play are returned to the box. If another three balls are selected for play a second time, what is the probability that they are all new?


    Please I will be very glad if you can help me to answer this queastionf for me the reply I have received theer is no answer.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Sep 3, 2010, 09:40 AM

    Do you know how to find a simple probability?

    The probability for taking one new ball from the bad is 8/18 (that is 8 new, out of 18 balls) which simplifies to a probability of 4/9.

    Do you know how to find the probability that the three first balls picked were new?
    ScottGem's Avatar
    ScottGem Posts: 64,966, Reputation: 6056
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    #5

    Sep 3, 2010, 03:55 PM

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    basirou disagrees : the question is not yet answer I did not se any answer can any one help me please

    First, may I call your attention to the guidelines for using the comments feature found here:

    https://www.askmehelpdesk.com/feedba...ure-24951.html

    Your use of a disagree was totally inappropriate.

    Second, this site has rules about asking homework questions. Did you check them out? We do not do the work for you. You need to show us that you tried to do the work and we can critique it or offer direction. Please comply with the rules of this site.
    morgaine300's Avatar
    morgaine300 Posts: 6,561, Reputation: 276
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    #6

    Sep 4, 2010, 02:21 AM

    ScottGem's answer was totally appropriate. If you were looking for an "answer" as in answer to the homework, we aren't here to just answer your homework for you.
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