Answer:
13 coins
Step-by-step explanation:
There are 25 kids in total.
The fraction of kids that are boys and girls are:
[tex]B=\frac{15}{25}=0.6\\B=\frac{10}{25}=0.4[/tex]
The mean number of coins for all kids is given by:
[tex]M=B*M_B+G*M_G[/tex]
If we are given that M = 10, and MB = 8, then the mean number of coins for the girls is:
[tex]10=0.6*8+0.4*M_G\\M_G=\frac{10-4.8}{0.4}\\M_G=13\ coins[/tex]
The mean number of coins for the girls is 13.
