The mean weight of a group of six boys is 64 kg. The individual weights (in kg) of five of them are 52, 57, 55, 60 and 68. Find the weight of the sixth boy.

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4.5

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Solution

The correct option is D
7

Mean weight of 6 boys = 64 kg.

Total weight of 6 boys = (64 × 6) kg = 384 kg.

Total weight of 5 boys = (52 + 57 + 55 + 60 + 68) kg

= 292 kg.

Weight of the 6th boy = (total weight of 6 boys) - (total weight of 5 boys)

= (384 - 292) kg

= 92 kg.

Hence, the weight of the sixth boy is 92 kg.

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