Question

The present ages (in years) of a father and his son are (5x + 4) and (2x + 10) respectively. If the sum of their present ages is 77 years, what will be the ratio of the father’s age to the son’s age 5 years from now?

A 13:15
B 18:11
C 17:15
D 11:10
E None of these
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