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

Solution(By Examveda 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