The average weight of 8 persons increases by 2.5 kg when a new person comes in p

Question

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. The weight of the new person is

Options:

A . 76 kg

B . 76.5 kg

C . 85 kg

D . 84 kg

Answer: Option C
Answer: (c)Weight of new person = (65 + 8 × 2.5) kg = (65 + 20) kg = 85 kg Aliter : Using Rule 23, Here, x = 2.5, n = 8 Weight of new person = weight of replaced boy + x × n

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