Multiple choice

In an examination, average marks of a student per paper were 71. If he would have obtained 35 more marks in sciences; 11 more marks in history and 4 more marks in computer science, his average marks per paper would have been 76. How many papers were there in the examination?

  1. 10

  2. 22

  3. 18

  4. 14
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total marks increase = 35 + 11 + 4 = 50. Average increase = 76 - 71 = 5. If n papers, then 50/n = 5, so n = 10. Options B (22), C (18), and D (14) would give average increases of 2.27, 2.78, and 3.57 respectively - none match 5.

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