Discussion :: Average
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Four years ago, the average age of A and B was 20 years. If today average age of A, B and C is 25 years, what will be age of C after 7 years?
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Answer : Option B
Explanation :
Total age of A and B four years ago = 20 ∗ 2 = 40 years
Present total age of A and B would be = 40 + 4∗2 = 48 years
Present total age of A, B and C is = 25 ∗ 3 = 75 years
∴ Present age of C would be = 75 - 48 = 27 years
Age of C after 7 years = 27 + 7 = 34 years
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