Assume that when adults with smartphones are randomly selected, 41% use them in meetings or classes. If 6 adult smartphone users are randomly selected, find the probability that exactly 4 of them use their smartphones in meetings or classes.
The probability is

The probability is 0.0179 or 1.79%

Step-by-step explanation:

This is a binomial probability distribution.

The probability of success is

The probability of failure is

Use the formula;

where n=6 is the number of trials and x=4 is the number of successes.

This implies that:

This simplifies to:

add 8+12 to get a simplified answer of 12r-20