The average weight of A, B, Cis 40 kg, the average weight of B, D, Eis 42 kg and the weight of Fis equal to that of B. What is the average weight of A, B, C, D, Eand F?
41 kg
Given:
Average weight of A, B, Cis 40 kg.
The average weight of B, D, Eis 42 kg.
The weight of Fis equal to that of B.
Calculation:
(A + B + C)/3 = 40
A + B + C = 120 -------(1.)
(B + D + E)/3 = 42
B + D + E = 126 --------(2.)
As B = F, so we can write F in place of B in equation (2.)
We get, F + D + E = 126 -------(3.)
Adding equation (1.) and (3.), we get
A + B + C + D + E + F = 120 + 126
A + B + C + D + E + F = 246
Avereage weight of A, B, C, D, E and F = 246 / 6 = 41
Hence, option 3 is correct.
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