 , 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.   Another question on Mathematics Mathematics, 21.06.2019 17:00
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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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