The average weight of Mukund, Sachin and Chetan is 46 kg. If the average weight of Mukund and Sachin be 39 kg and that of Sachin and Chetan be 45 kg, then the weight of Sachin (in kg) is:
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Correct answer: D
Explanation
The correct answer is option 4 i.e. 30 .
Mukund + Sachin + Chetan = 46 × 3 = 138
Mukund + Sachin = 39 × 2 = 78
Sachin + Chetan = 45 × 2 = 90
Chetan = 138 − 78 = 60
Sachin = 90 − 60 = 30