Question

Thirty percent of the people called agree to participate in a brief telephone survey. In a random sample of four people called, what is the probability that exactly two people would not agree to participate in the survey?

a) 0.3000 b) 0.1500 c) 0.2646 d) 0.1698

P(2 don’t agree) = 4C2(.7)2(1-.7)2 = 6 * .49 * .09 = .2646

Where did the 0.7 come from in this equation?

Answer 1

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