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Mathematics, 23.03.2021 23:10 poppygirl193

There is a total of 45 boys and girls in a choir. The mean age of the 18 boys is 16.2 years.
The mean age of the 27 girls is 16.7 years.

Calculate the mean age of all 45 boys and girls.

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There is a total of 45 boys and girls in a choir. The mean age of the 18 boys is 16.2 years.
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