Question
The average weight of a group of people is 62 kg. A person
weighing 80 kg joins the group and the average increases by 1 kg. Find the total weight of the group before the new person joined.Solution
Let the number of people before joining be 'P'.
Weight before = 62P
(62P + 80) / (P + 1) = 63
=> 62P + 80 = 63P + 63
=> P = 17
Total weight = 62 × 17 = 1054 kg
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