Assume that when adults with smartphones are randomly​ selected, 43​% use them in meetings or classes. If 13 adult smartphone users are randomly​ selected, find the probability that fewer than 5 of them use their smartphones in meetings or classes.

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Assume that when adults with smartphones are randomly​ selected,

43​%

use them in meetings or classes. If

13

adult smartphone users are randomly​ selected, find the probability that fewer than

5

of them use their smartphones in meetings or classes.

Expert Solution
Step 1

given data,p(use smart phone in meeting or classes) = 0.43p = 0.43q = 1 - p = 1 - 0.43    = 0.57n = 13p(X = x) =ncx * px * qn-x   (  binomial distribution) X = no of smart phone users are randamlyselected.

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