Question

The batsman.makes a score of 92 runs in his 16th innings , then his average runs increases by 4 then find average runs of batsman before his 16th innings and after his 16th innings

Answer 1

let x be the average before 16th inings
then (15x+92)/16=x+4
15x+92=16x+64
or 16x-15x=92-64
x=28
average before 16th inings =28
after 16th inings average increase by 4 means 32

Answer 2

Refer the attachment.