The average weight of 5 boys is 48 kg and the average weight of 4 boys out of these is 47 kg. find the weight of the fifth boy
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Answer:
let,
the five boys are A,B,C,D,E,F
average wait =48
therefore,
total wait of five boys =48×5=240.........(1)
and the average wait of four boys=47
therefore,
total wait of four boys=47×4=188........(2)
from eq. num.(1) and (2)
we get wait of fifth boy=240-188=52
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