Question

A batsman  has certain average in his 11 innings. He scores 90 runs in 12th innings due to this his average decreased by 5 runs, find his current average.
1. 145
2. 144
3. 143
4. 148

Answer 1

Correct Answer - Option 1 : 145

Given:

12th innings run = 90 runs

Decrease in average = 5 runs

Formula use:

Average of the runs = (Total runs/number of matches)

Calculations:

Let, the average runs = x

⇒ Total runs after 11th innings = 11x

⇒ (11x + 90)/12 = (x - 5)

⇒ 11x + 90 = 12x - 60

⇒ 12x - 11x = 150

⇒ x = 150 runs

⇒ Current average = 150 - 5

⇒ Current average = 145 runs

∴ Current average is 145 runs.