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The average weight of 3 men, A, B, and C, is 84 kg. Another man, D, joins the group, and the average weight now becomes 80 kg. If another man, E, whose weight is 3 kg more than that of D, replaces A, then the average weight of B, C, D, and E becomes 79 kg. What is the weight of A?

Answer :

The weight of A is 75kg.

How to calculate the weight?

Total weight of A + B + C = 84 x 3 = 252kg

Total weight of A + B + C + D = 80 x 4 =.320 kg

Weight of D = 320 - 252 = 68 kg

Given, E = D + 3 = (68 + 3) kg = 71 kg

Total weight of B + C + D + E = (79 x 4) = 316 kg

Weight of B + C = 316 kg - 71 kg - 68 kg = 177 kg

Weight of A only will be:

= 320 kg - 177 kg - 68 kg

= 75 kg

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