Question

A cricketer has some average score of 9 innings. He scores 100 in next innings and
his average increases by 8. What was his new average​

Answer 1

So, Ajit scored 9x run in 9 innings. In the 10th inning, he scored 100 runs then average became (x+8). And he scored (x+8)*10 runs in 10 innings. New average = (x+8) = 28 runs

Answer 2

Answer:

Let his average be x for 9 innings.

So, he scored 9x run in 9 innings.

In the 10th inning, he scored 100 runs.

Then average became (x+8).

And he scored (x + 8) × 10 runs in 10 innings.

Now,

⇒9x+100=10×(x+8)

or,9x+100=10+80

or,x=100−80

or,x=20

Newaverage=(x+8)

=28runs

Hope it helped you.