Question

Three years ago the average age of A and B was 18 years. With C joining them, the average age becomes 22 years. How old is C now?
21 years
22 years
25 years
24 years​

Answer 1

Answer:

22 years

Step-by-step explanation:

Average Age of A and B = (A+B)/2 = 18

When C joins them = {(A+B)/2}+C= 22

C = 22 - (A+B)/2

C= 22 - 18 = 4

C= 4

Hence C is (18+4)= 22