The average weight of Mohan, Mohammad and Ashish is 45 kg. If the average weight of Mohan and Mohammad be 43 kg and that of Mohammad and Ashish be 46 kg, then the weight of Mohammad (in kg) is:
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Correct answer: C
Explanation
The correct answer is option 3 i.e. 43 .
Let weights of Mohan, Mohammad and Ashish be M1, M2 and M3
Average of three = M1 + M2 + M3 = 45 × 3 = 135
Average of Mohan and Mohammad = 43 × 2 = 86
Average of Mohammad and Ashish = 46 × 2 = 92
M1 + M2 + M3 − (M1 + M2) = 135 − 86
M3 = 49
M2 + M3 = 92
M2 + 49 = 92
M2 = 43