Four members of a family have an average weight of 55 kg. When a fifth member joins, the average drops to 52 kg. What does the new member weigh (in kg)?

Question

Accepted Answer

40. Old total = 4 × 55 = 220 kg; new total = 5 × 52 = 260 kg. New member = 260 − 220 = 40 kg.

Four members of a family have an average weight of 55 kg. When a fifth member joins, the average drops to 52 kg. What does the new member weigh (in kg)?

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