Question

The average age of 40 boys of a class is 12 year - when to 10 new
boys are admitted, the average is increased by (0.1) year
what is average age of new boys?​

Answer 1

Answer:

sorry I didn't know sorry

Answer 2

Answer:

Step-by-step explanation:

average of 40 boys is 12

Let Total age of all boys be x

X/40=12

Total age =480 (1)

New 10 were added so now total boys are 50

Average increased to 12.1

X/50=12.1

New total age =605 (2)

Subtract 1 from 2

So we get 125

Total new boys are 10

New average =125/10=12.5

Hope it helps thank u