Assume that when adults with smartphones are randomly selected, 47% use them in meetings or classes. If 10 adult smartphone users are randomly selected, find the probability that fewer than 4 of them use their smartphones in meetings or classes.

22.51% probability that fewer than 4 of them use their smartphones in meetings or classes.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they use their smartphones in meetings or classes, or they do not. The probability of an adult using their phone is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening

47% use them in meetings or classes.

This means that

10 adult smartphone users are randomly selected

This means that

Find the probability that fewer than 4 of them use their smartphones in meetings or classes.

In which

22.51% probability that fewer than 4 of them use their smartphones in meetings or classes.

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are

,xzgv

step-by-step explanation:

; oqirjg'