Assume that when adults with smartphones are randomly​

2022-04-30 Answered

Assume that when adults with smartphones are randomly​ selected,

54​%

use them in meetings or classes. If

5

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

3

of them use their smartphones in meetings or classes.

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Answers (1)

star233
Answered 2022-05-14 Author has 137 answers

P(Smartphones)=0.54

n=5

P(x=k)= nCkPk(1-P)n-k;       k=0, 1, 2,...n

P(x=3)= 5C3(0.54)3(0.46)2

=10(0.54)3(0.46)2

=10×0.1575×0.2116

=0.3333

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