Question

A boy made 23 runs in the first match, 12 runs in the next, 15 runs in the third and 20 runs in the fourth match. How many runs must he make in the fifth match to keep his average 16?​

Answer 1

let the fifth matches run be x

(23+12+15+20+x)/5=16

( 70+x)=16*5

70+x=80

x =80-70

(x =10)