The average weight of A, B and C is 45 kg. if the average weight of A and B is 40 kg and that of B and C is 43 kg, then the weight of B is

(a)17 kg (b)20 kg (c)26 kg (d)31 kg

The average weight of A, B and C is 45 kg. if the average weight of A and B is 40 kg and that of B and C is 43 kg, then the weight of B is

(a)17 kg (b)20 kg (c)26 kg (d)31 kg

1 Answer - 5876 Votes

3537

Let represent their respective weights. Then, we have:

Adding , we get

Subtracting from we get

B’s weight = 31 kg.