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A batsman in his 17th innings makes a score of 85, and thereby increases his average by 3. What is his average after the 17 innings ? Provided that he had never been 'not out'.

Explanation:

Let x be the average after 17th innings

So runs scored in all the innings summed is 17x

Runs scored in 16 innings is 16(x-3)

Runs scored in 17th innings is 17x -16(x-3) = 85

i.e ,x = 37.

By: Deepak Dawra

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