Multiple choice

A batsman has a certain average of runs for 12 innings. In the 13th inning, he scores 69 runs, thereby decreasing his average by 2 runs. Find his original average runs.

  1. 95 runs

  2. 94 runs

  3. 92 runs

  4. 91 runs

  5. 90 runs
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A Correct answer
Explanation

Let his original average runs be x runs.

So, sum of runs of 12 innings = 12x 

New sum of runs after 13 innings = 12x + 69

So, new average = (12x + 69)/13

x - 2 = (12x + 69) /13

x = 95 

Therefore, original average runs = 95

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