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 BShow Answer
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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