The average of the present ages of A and C is 3 less than the present age of B. If the present age of B is 60% more than that of A and the present age of C is 12 years more than that of A, then find the average of the present ages of A, B and C.
1
20 years
2
21 years
3
22 years
4
24 years
5
25 years