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17 April, 18:27

Rework problem 30 from the Chapter 2 review exercises in your text, involving basketballs with defective valves. For this problem, assume the bag contains 15 basketballs, 7 of which have defective valves. You choose 3 out of the bag randomly. What is the probability that at least 1 will have a defective valve?

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  1. 17 April, 19:28
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    Answer: 0.877

    Step-by-step explanation:

    The bag contains 15 basketballs

    7 have defective valves.

    8 are good

    choose 3 out of the bag randomly

    probability that at least 1 will have a defective valve = 1 - probability of none have a defect, so

    P of no defect: 8/15 * 7/14 * 6/13 = 0.123

    at least 1: 1 - 0.123 = 0.877
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