Use the Appropriate Probability Model (Uniform)

Use the appropriate probability model (Uniform) .
-Suppose the time it takes for customer representatives to diagnose and fix computer
Problems is uniformly distributed from 10 to 120 minutes. What is the probability that a
Problem is diagnosed and fixed within 30 minutes?

A) 0.27
B) 0.73
C) 0.82
D) 0.50
E) 0.18