Assume that when adults with smartphones are randomly selected, 62% use them in meetings or classes

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Assume that when adults with smartphones are randomly selected, 62% use them in meetings or classes

Assume that when adults with smartphones are randomly selected, 62% use them in meetings or classes. If 8 adult smartphone users are randomly selected, find the probability that exactly 3 of them use their smartphones in meetings or classes.

The probability is _______

math Statistics-And-Probability

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Answer 1

Answer #1

Probability of success ( p )=62% = 0.62

Number of trials ( n ) = 8,

Number of success = 3

we want to find P(x= 3)

formula is

$P(X = 3) = 8C3 * 0.62^{3} * ( 1 - 0.62)^{8-3}$

P(X = 3) = 0.105750

Probability = 0.1058

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Answer 2

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