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Statistics - Probability

1. According to a study the popular belief is 80% of adults enjoy drinking beer. If 3 adults were chosen at random from this study, what would the probability be that none of them enjoy drinking beer? Explain how you found your answer.

2. A family has 5 children and 1 of them is a boy...the percentage of boy is 1/5, or .020. Do you think one could say the chances of any woman having a boy would be 1/5?

Solution Preview

(1) p = 0.80, q = 1 - p = 0.20, n = 3, r = 0

P(r, n) = nCr p^r ...

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