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tester [92]
3 years ago
8

There are 15 boys and 10 girls in a hall, each holding coins in their hand.The mean number of coins for the children is 10 The m

ean number of coins for the boys is 8Work out the mean number of coins for the girls.
Mathematics
1 answer:
DiKsa [7]3 years ago
6 0

Answer:

13 coins

Step-by-step explanation:

There are 25 kids in total.

The fraction of kids that are boys and girls are:

B=\frac{15}{25}=0.6\\B=\frac{10}{25}=0.4

The mean number of coins for all kids is given by:

M=B*M_B+G*M_G

If we are given that M = 10, and MB = 8, then the mean number of coins for the girls is:

10=0.6*8+0.4*M_G\\M_G=\frac{10-4.8}{0.4}\\M_G=13\ coins

The mean number of coins for the girls is 13.

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