The average weight of Kiran, Mahesh and Ram is 46 kg. If the average weight of Kiran and Mahesh be 40 kg and that of Mahesh and Ram be 47 kg, then the weight of Mahesh (in kg) is:
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Correct answer: C
Explanation
The correct answer is option 3 i.e. 36.
K + M + R = 46 × 3 = 138
K + M = 40 × 2 = 80
M + R = 47 × 2 = 94
Add (K + M) + (M + R) = 80 + 94 = 174 = K + 2M + R
But K + M + R = 138
So (K + 2M + R) – (K + M + R) = 174 – 138 = M
M = 36