Assume that when adults with smartphones are randomly selected, 57% use them in meetings or classes. if 9 adult smartphone users are randomly selected, find the probability that at least 3 of them use their smartphones in meetings or classes the probability is ?

0.9617

Step-by-step explanation:

Given : The proportion of adults use their phones in meetings or classes : p=0.57

Number of adults randomly selected : n= 9

Let x be the random variable that represents the number of adults use their phones in meetings or classes.

By using binomial probability formula, to find the probability of getting success in x trials.

The probability that at least 3 of them use their smartphones in meetings or classes will be :-

Hence, the required probability is 0.9617 .

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