Question

The average weight of 10 men is decreased by 2 kg
when, one of them weighing 140 kg is replaced by
another person. Find the weight of the new person.
(a) 142 kg
(b) 130 kg
(c) 138 kg
(d) 120 kg​

Answer 1

Answer:

(d) 120 kg

Step-by-step explanation:

average weight of 10 men is decreased by 2 kg

total decrease = 10×2 = 20 kg

this 20 kg decrease is due to replacing 140kg with a lower kg weight of the same 20kg amount

so weight of the new person = 140-20 = 120 kg