Assume that when adults with smartphones are randomly selected, 42% use them in meetings or classes. If 5 adult smartphone users are randomly selected, find the probability that exactly 2 of them use their smartphones in meetings or classes

The probability that exactly 2 of 5 use their smartphones in meetings or classes is 0.3442.

Step-by-step explanation:

Let X = number of adults who use smartphones in meetings or classes.

The probability of the random variable X is, P(X) = p = 0.42

A sample of n = 5 adult smartphone users are selected.

The random variable X follows a Binomial distribution with parameters n and p.

The probability mass function of X is:

Compute the value of P (X = 2) as follows:

Thus, the probability that exactly 2 of 5 use their smartphones in meetings or classes is 0.3442.