Question

The ratio of difference between the present age of A and B to the present age of B and C is 6:1. 6 years hence, the ratio between the age of A and C is 21:11. If the present age of B is 25% less than the present age of
C. find the sum of the present age of A, B, and C? 

A 50 years
B 64 years
C 65 years
D 54 years
E 72 years
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