Answer
0.19
Work Step by Step
Let's call the probability of a college student being between 18 and 20 years old" = x
As all probabilities in a probability model add up to one, we obtain:
(0.03 + x + 0.23 + 0.29 + 0.25 + 0.01) = 1
= ( x + 0.81) = 1
x= 1 - 0.81
x = 0.19
Thus, the probability that a randomly selected student at the college is between 18 and 20 years old = 0.19
