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Problems on Ages (Railways - RRB)
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Five years ago, the average age of A and B was 11 years. After adding the age of C to the ages of A and B, the average remained the same. How old is C now?
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A
16 years
💡 Explanation:
Five years ago, average age of A and B = 11 years
So, sum of ages of A and B, 5 years ago = 11 x 2 = 22 years
On adding the age of C, average age of A, B and C = 11 years
So, (22 + C)/3 = 11
22 + C = 33
C = 11
Therefore, 5 years ago, C's age was 11 years.
So, present age of C = 11 + 5 = 16 years