According to a Gallup poll, 60% of American adults prefer saving over spending. Suppose 9 American adults are randomly chosen. Use the formula for binomial probabilities P(k) ・(笑)がエー -p)- to find the probability that exactly 8 of the 9 people sampled prefer saving over spending. (a) First fill in the details of the binomial probability formula: P(8) = (8)000 (b) The probability, accurate to 3 decimal places, is

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