If the average of the ages of Rakesh and Mohan is 15, average of the ages of Mohan and Ramesh is 12 and the average of the ages of Rakesh and Ramesh is 13, then the age of Mohan, is
Correct Answer: Description for Correct answer:
Let the ages of Rakesh, Mohan and Ramesh be R, M, r respectively
Then, R + M = 15 x 2 = 30 ... (1)
M + r = 12 x 2 = 24 ... (2)
R + r = 13 x 2 = 26 ...(3)
Adding the above three equations, we get
2(R + M + r) = 30 + 24 + 26 = 80
= > R + M + r = 40
Subtracting (3) from (4) we get M = 40 - 26 = 14
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