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# The ratio of Ali's age to that of his younger brother is 7:5.If his younger brother is 15years old,then Ali's age in years is

$\begin{array}{1 1}(A)\;18&(B)\;17\\(C)\;21&(D)\;28\end{array}$

The ratio of Ali's age to that of his younger brother is 7:5.If his younger brother is 15years old,then Ali's age in years is 21
Hence (C) is the correct answer.
answered Apr 11, 2014