Question
The average weight of A, B and C is 43 kg. If the
average weight of A and B is 40 kg and that of B and C is 41 kg, then the weight (in kg) of B is?Solution
The average weight of A, B and C =43kg Total weight of A, B and C=43×3=129kg. Similarly- Total weight of A and B =40×2=80kg. Total weight of B and C =41×2=82kg. Weight of C =(A+B+C)-(A+B) =129-80=49. So now weight of B=82-49 =33kg
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