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The mean height of 20 boys and 14 girls is 161 cm. If the mean height of the 14 girls is 151 cm , find the mean height of 20 boys

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Total height of 34 children = 161 x 34 = 5474 cm. Ht of 14 girls =
14 x 151 = 2114 cm => ht of 20 boys = 3360 => mean ht of boys
= 168.

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