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Five years ago the average age of A, B, C, D was 45 years. By including X the present average of all the five is 49 years. Them the present age of X is-

A. 40 years B. 45 years C. 48 years D. 64 years Answer: Option B
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Solution(By Apex Team)

Sum of the present ages of A, B, C and D = (45 × 4 + 5 × 4) years = 200 years Sum of the present ages of A, B, C, D and X = (49 × 5) years = 245 years ∴ X’s present age = (245 – 200) years = 45 years

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