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Yesterday, 22:36

Assume that when adults with smartphones are randomly selected, 54 % use them in meetings or classes. If 66 adult smartphone users are randomly selected, find the probability that exactly 44 of them use their smartphones in meetings or classes.

I figured out that n=6, x=4, and p=0.54.

I think I am supposed to use the binomial formula but I don't know how to.

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  1. Yesterday, 22:38
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    N - number of sample = 66

    X = 44

    P=0.54

    q = 1-0.54

    66 C 44 * 0.54^44 * (1-0.54) ^ (66-44)
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