Among 19 - to 24-year-olds, 35% say they have called a talk show while under the

Question

Among 19 - to 24-year-olds, 35% say they have called a talk show while under the influence of alcohol. suppose seven 19 - to 24 - year-olds are selected at random (a) What is the probability that at least one has not called a talk show while under the influence of alcohol? (b) What is the probability that at least one has called a talk show while under the influence of (a)The probability that at least one has not called a talk show while under the influence of alcohol is (b) The probability that at least one of the seven randomly selected adults has called a talk show while under the influence of alcohol is

Explanation / Answer

a) To compute probability that at least one has not talk show, just compute (0.35)^7 and substract it from 1

that is 1- (0.35)^7 = 0.9994

b)probability that person not call talh show is 0.65.

There fore for seven people, none of them called to talk show is (0.65)^7

and probability that at least one of them is called for talk show is 1- (0.65)^7= 0.9510.

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