It is assumed that the time customers spend in a record store is uniformly distributed between 3 and 12 minutes. Based on this information, what is the probability that a customer will spend more than 9 minutes in the record store?
A) 0.33
B) 0.1111
C) 0.67
D) 0.25

Question

Quizplus · Accepted Answer

The total range of time is 12 - 3 = 9 minutes. The time spent over 9 minutes ranges from 9 to 12, which is 3 minutes. The probability is 3/9 = 1/3 or 0.33.

It Is Assumed That the Time Customers Spend in a Record