Table: Reviewees who passed a mock exam — Group A 36 of 45, Group B 42 of 60, Group C 27 of 30. What was the passing rate of Group B?
Correct answer: B. 70%
Passing rate = 42 ÷ 60 × 100 = 70%. Simplifying first also works: 42/60 = 7/10 = 70%. Always divide the number who passed by the number in that group only, not by the total of all groups.
easy