# What will be the Number of Pupils in the Class? If

A pupil’s marks were wrongly entered as 83 instead of 63. Due to that, the average marks for the class got increased by half (1/2). The number of pupils in the class is:

- 10
- 20
- 40
- 73

**Answer: (C) 40
Explanation:-**

Let be the number of pupils in a class = X

Total increase in marks = (X x ½) = X/2

Therefore, X/2 = 83 – 63

X/2 = 20

X = 2 x 20 = 40

Hence. The answer is (C) 40