Assume that when adults with smartphones are randomly selected 58% use them in meetings or classes
If nine adult smartphone users are randomly selected find the probability that exactly three of them use their smartphones and meetings or classes.
The problem can be solved using the binomial distribution

Where n is the number of trials, x is the variable of interest and p is the probability of success.
p = 0.58
n = 9
x = 3
Let us substitute the given values into the above formula

Therefore, there is a 9.00% probability that exactly three of them use their smartphones and meetings or classes.