The average weight of three boys A,B and C is `54 1/3 kg, while the average weight of three boys B, D and E is 53 kg. What is the average weight of A, B, C, D and E ?
Total weight of (A + B + C) = `(54 1/3 xx 3)`kg = 163 kg
Total weight of (B + D + E) = 53 x 3 = 159 kg
Adding both , we get A + 2B + C + D + E = (163 + 159)kg = 322 kg
so to find the average weight of A, B, C, D and E, we ought to now B's weight , which is not given. so the data inadequate.
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