The average weight of Mandar, Ketan and Tushar is 45 kg. If the average weight of Mandar and Ketan be 43 kg and that of Ketan and Tushar be 48 kg, then the weight of Ketan (in kg) is:
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Correct answer: B
Explanation
The correct answer is option 2 i.e. 47.
M + K + T)/3 = 45 → M + K + T = 135
(M + K)/2 = 43 → M + K = 86
(K + T)/2 = 48 → K + T = 96
Now subtract (2) from (1):
M + K + T − (M + K) = 135 − 86
T = 49
Hence,
K + T = 96 → K + 49 = 96 → K = 47