Mathematics, 20.09.2020 07:01 granta1
There are 9 boys and 6 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 14 Work out the mean number of coins for the girls.
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There are 9 boys and 6 girls in a hall, each holding coins in their hand. The mean number of coins f...
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