Question:
Three years ago the average age of A and B is 18yrs. With the joining of C now, the average becomes 22 yrs. How old is C now?
A24 years
B30 years
C28 years
D27 years
Answer:
A. 24 years
Explanation:
3 years ago the average age of A and B=18 years . the present average age of A and B = 18+3=21yrs The total age of A and B=21x2=42yrs Now after the joining of C, the average age becomes 22 yrs. The total age of A, B and C=22x3=66 yrs. Now the age of 'C'=66-42=24yrs