Average Practice Test 6

Question : 24 of 40

Marks: +1, -0

In an examination, a student's average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and two more marks for his History paper, his average per paper would have been 65. What were the number of papers in the examination?

Validate

Solution:

Let the total number of papers be x; then

{63x+20+2}/x=65

⇒ 63x + 22 = 65x

⇒ 2x = 22

∴ x = 11

Hence, number of papers = 11.

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