Question

A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th innings.

Answer 1

Let the average after 7th inning = x
Then average after 16th inning = x - 3
16(x-3)+87 = 17x
 x = 87 - 48 = 39

i hope this will help u

Answer 2

Refer the attachment.