in a class the average weight of body, is numerically equal to the number of girls.And the number of body is numerically 11 less than the average weight of girls. The average weight of the boys is 5 kg more than that of girls. what is the average weight of all the boys and girls together if the number of girls is 48?
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45 kg is the average weight of all the boys and girls together
Step-by-step explanation:
the average weight of boys, is numerically equal to the number of girls
number of girls is 48
Average weight of boys = 48 kg
average weight of the boys is 5 kg more than that of girls
average weight of girls = 48-5 = 43 kg
number of boys is numerically 11 less than the average weight of girls. = 43 - 11 = 32
total weight = 43×48 + 48 × 32 = 48 × 75 kg
total boys and girls = 48 + 32 = 80
together average weight = 48 × 75 / 80 = 45
the average weight of all the boys and girls together i= 45 kg
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