Question

The average weight of 8 people is 75 kg. When three new people with their weights in the ratio 3:4:5 joined the group, the average weight of all the people remains the same. Find the difference between the weights of the lightest and the heaviest new people who joined the group.

A 65.5 kg
B 20.5 kg
C 35.5 kg
D 37.5 kg
E none of these
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