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In a certain examination, the average marks of an examinee is 64 per paper. If he had obtained 18 more marks for his mathematics paper and 4 more marks for his English paper, his average per paper would have been 66. How many papers were there in the examination?

A) 11
B) 13
C) 9
D) 15

Correct Answer:

A) 11

Description for Correct answer:
Let the number of papers = x.

According to the question

64x + 18 + 4 = 66x
2x = 22

X = (22/2) = 11

Part of solved Average questions and answers : >> Aptitude >> Average

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