Question

In a test consisting of 200 questions, Amit answered 40% of the first 120 questions correctly. What percent of the 80 remaining questions does he need to answer correctly for his score in the entire test to be 60%?

• A. 80%
• B. 75%
• C. 90%
• D. 51%

Answer 1

Answer:

C. 90%

Let x% of the remaining 80 questions are correct. 40% of 120 + x% of 80 = 60% of 200 ⇒ 48 + 80 × (x/100) = 120 ⇒ 4x/5 = 72 ⇒ x = 90