The average weight of A, B and C is 45 kg. When D joins them the average becomes 44 kg. Then E, who is 3 kg heavier than D, replaces A, and the average of B, C, D and E is 43.5 kg. What does A weigh?

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Accepted Answer

46 kg. A + B + C = 135, so D =176-135=41 and E =44. B + C + D + E = 174 → B + C = 89. Hence A =135-89=46 kg. (41 kg is D.)

The average weight of A, B and C is 45 kg. When D joins them the average becomes 44 kg. Then E, who is 3 kg heavier than D, replaces A, and the average of B, C, D and E is 43.5 kg. What does A weigh?

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