The average weight of A, B and C is
80 kg. If D joins the group, the
average weight becomes 84 kg.
When E joins the group, the
average weight becomes 3 kg more
than the group, where D replaces
A. Find the weight of A.
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Answer:
A+B+C=252
A+B+C+D=320
SOLVING WE GET
D=320-252=68 AND E =68+3=71
B+C+D+E=316
SOLVING WE GET
A-E=4
A=75
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