Bob's score of 40 on a statistics test was reported to be at the 60th percentile. Fifty students took the test. How many students scored lower than Bob?
A) 20
B) 30
C) 40
D) 50

Question

Quizplus · Accepted Answer

If Bob's score of 40 is at the 60th percentile, that means 60% of the students scored below him and 40% of the students scored above him. So, 0.4 x 50 = 20 students scored above him. Therefore, 50 - 20 = 30 students scored lower than Bob.

Bob's Score of 40 on a Statistics Test Was Reported