In a test of 150 questions carrying 1 mark each, Rishab answered 80 percent of the first 75 questions correctly. What percent of the other 75 questions must he answer correctly to score 60 percent overall?

A20

B40 ✓ Correct

C50

D60

Correct answer: (B) 40

Explanation

He must answer 40 percent of the rest correctly.

first 75 correct = 80% of 75 = 60.

overall target = 60% of 150 = 90 marks.

needed from next 75 = 90 - 60 = 30.

percent = 30 / 75 x 100 = 40 percent.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.