Average weight of 10 men is decreased by 3 kg when one of them whose
weight is 80 kg is replaced by a new person. The weight of the new person is.
(a) 70 kg
(b) 60 kg (c) 50 kg(d) 73 kg
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Answer:
x*10_3=80
x_3=80/10
x_3=8
x=8+3=11
10*11=110
10*8=80
110_80=50kg
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