Average weight of 25 persons is increased by 1 kg when one man weighing 60 kg is replaced by a new person. Weight of new person is :
Options:
A . 61 kg
B . 50 kg
C . 85 kg
D . 86 kg
Answer: Option C Answer: (c)Total weight increased = 1 × 25 = 25 kg ∴ Weight of new person = 60 +25 = 85 kg Aliter : Using Rule 18,If in the group of N persons, a new person comes at the place of a person of 'T’ years, so that average age, increases by 't’ years Then, the age of the new person = T + N.t.Here, N = 25, T = 60 t = 1 Weight of New person = T + Nt = 60 + 25 × 1 = 85 Kg
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