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Four students order noodles at a certain local restaurant. Their orders are placed independently. Each student...

Four students order noodles at a certain local restaurant. Their orders are placed independently. Each student is known to prefer Japanese pan noodles 40% of the time. How many of them do we expect to order Japanese pan noodles? I know the answer is 1.6, but I’m not getting that answer.

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Answer #1

This is binomial probability distribution problem with n=4 and p = 0.40 The pmf of binomial distribution is, Þex=x)= 6 p 61-p

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