### In an examination, a pupil’s average mark was 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?

A. 8 B. 9 C. 10 D. 11 Answer: Option D
Show Answer

### Solution(By Apex Team)

\begin{array}{l}\text{Let the number of paper be x}\\ \text{Then, pupil’s total score = 63x}\\ \begin{aligned}&\therefore\frac{63x+20+2}{x}=65\\ &\Rightarrow2x=22\\ &\Rightarrow x=11\end{aligned}\end{array}

## Related Questions On Average

A. 20
B. 21
C. 28
D. 32
Show Answer

A. 18
B. 20
C. 24
D. 30
Show Answer

A. 10 years
B. 10.5 years
C. 11 years
D. 12 years
Show Answer

### If the arithmetic mean of 0, 5, 4, 3 is a, that of -1, 0, 1, 5, 4, 3 is b and that of 5, 4, 3 is c, then the relation between a, b, and c is.

A. a = b = c
B. a : b : c = 3 : 2 : 4
C. 4a = 5b = c
D. a + b + c = 12
Show Answer