The average weight of Mandar, Ketan and Tushar is 45 kg
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:
मंदार, केतन और तुषार का औसत वजन 45 kg है। यदि मंदार, और केतन का औसत वजन 43 kg है, और केतन और तुषार का औसत वजन 48 kg है, केतन का वजन (kg में) ज्ञात कीजिए।
Detailed Solution & Logic
Correct Answer:
47
Let the weights of Mandar, Ketan, Tushar be } M, K, T.
$ \frac{M + K + T}{3} = 45 M + K + T = 135 $
$ \frac{M + K}{2} = 43 M + K = 86 $
$ \frac{K + T}{2} = 48 K + T = 96 $
Add the last two equations: (M + K) + (K + T) = 86 + 96
M + 2K + T = 182
Subtract (M + K + T = 135)
(M + 2K + T) - (M + K + T) = 182 - 135
K = 47
Answer = 47
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