Question

Assume that when adults with smartphones are randomly​ selected, 46​% use them in meetings or classes. If 8 adult smartphone users are randomly​ selected, find the probability that exactly 2 of them use their smartphones in meetings or classes

Answer 1

Solution:

We are given:

Let x be the random variable that denotes the number of adult smartphone users that use their smartphones in meetings or classes. Then the random variable x follows the binomial distribution with n = 8 and p = 0.46 Therefore, we have to find:

Now using the binomial distribution probability formula, we have: