A batsman in his 12th innings makes a score of 63 runs and there by increases his average scores by 2. What is his average after the 12th innings?

Explanation

Let the average of batsman after 11th innings = A Total score made by batsman at the end of 11th innings = A 11 \ Total score after 11th innings = 11 A Total score after 11th innings + score made in 12th innings = + Now, A 2 12 Þ 11A + 63 = (A + 2) × 12 Þ 11A – 12 A = 24 – 63 Þ A = 39 12th innings average = 39 + 2 = 41