Question

Seven years ago, 'R' and 'C' had ages in a ratio of 4:3, respectively. After seventeen years, the ratio of 'C' and 'R's ages will be 9:10, respectively. Calculate the difference in the ages of 'R' and 'C'.

A 15 yrs
B 12 yrs
C 4 yrs
D 6 yrs
E none of these
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