Question

Anita's Mathematics test had 70 problems carrying equal marks i.e., 10 arithmetic, 30 algebra and 30 geometry. Although she answered 70% of the arithmetic, 40% of the algebra and 60% of the geometry problems correctly, she did not pass the test because she got less than 60% marks. The number of more questions she would have to answer correctly to earn a 60% passing marks is

• A. 1
• B. 5
• C. 7
• D. 9

Answer 1

Answer:

B. 5

Total number of question that Anita found correct = 7+ 12 + 18 = 37 Let the required number of questions are x, then as per question, 60% of 70 = 37+x 42 = 37 + x x = 42-37=5