Question

A batsman scored 3 runs in his 21^st innings and his average score remains the same as before the 21^st innings. Find his average score in the innings.
1. 3
2. 4
3. 2
4. 6

Answer 1

Correct Answer - Option 1 : 3

Given: A batsman scored 3 runs in his 21^st innings and his average score remains the same as before the 21^st innings.

Formula: Average of n numbers a1, a2, ... an = (a1 + a2 + ... + an)/n

Calculation: let his average score in the innings be x

(20x + 3)/21 = x

⇒ 20x + 3 = 21x

⇒ X = 3