Homework: HW7 Score: 0 of 1 pt 5.2.22-T Save 420 of 30 (27 complete) HW Score: 7

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Homework: HW7 Score: 0 of 1 pt 5.2.22-T Save 420 of 30 (27 complete) HW Score: 71.53%, 21.46 of 30 pts E Question Help Assume that when adults with smartphones are randomly selected, 41% use them in meetings or classes lf 20 adult smartphone users are randomly selected, find the probability that exactly 15 of them use their smartphones in meetings or classes The probability is ? Round to four decimal places as needed) Enter your answer in the answer box and then click Check Answer. Clear All All parts showing 6/25 rch

Explanation / Answer

Solution :

Given that ,

p = 0.41

1 - p = 1 - 0.41 = 0.59

n = 20

x = 15

Using binomial probability formula ,

P(X = x) = ((n! / x! (n - x)!) * px * (1 - p)n - x

P(X = 15) = ((20! / 15! (20 - 15)!) * 0.4115 * (0.59)20 - 15

=   ((20! / 15! (5)!) * 0.4115 * (0.59)5

=  0.0017

Probability = 0.0017

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