Question

There are 24 boys and 16 girls in a hall, each holding coins in their hand.

The mean number of coins for the children is 18
The mean number of coins for the boys is 12
Work out the mean number of coins for the girls.

Answer 1

27

Explanation:

total=average ×no.

18×40=720 the no. of coins for all children

12×24=288 no. of coins for boys

720-288=432 for all girls

one girl, mean,divide 432 by 16= 27