The miles-per-gallon obtained by the 1995 model Z cars is normally distributed with a mean of 22 miles-per-gallon and a standard deviation of 5 miles-per-gallon. What is the probability that a car will get less than 21 miles-per-gallon?

0.42074

Step-by-step explanation:

In this question, we are asked to calculate the probability that a car will get less than 21 miles per gallon.

This is P (x < 21)

z = 21-22/5 = - 1/5 = - 0.2

Therefore the probability of getting less than 21 miles per gallon will be;

P (x<21) = P (z < - 0.2)

= 0.42074