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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


Question ID - 50840 | Toppr Answer

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

Answer Key : (d) -

Let  represent their respective weights. Then, we have:

 Adding , we get

Subtracting  from  we get

 B’s weight = 31 kg.



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