Aptitude Question ID : 94354

If a : b = c : d, then \frac{ma+nc}{mb+nd} is not equal to :
[A]\frac{a}{b}
[B]\frac{c}{d}
[C]\frac{c-a}{b-d}
[D]\frac{a+c}{b+d}

\mathbf{\frac{a+c}{b+d}}
a : b = c : d
=> \frac{a}{b} = \frac{c}{d} = \frac{ma}{mb} = \frac{nc}{nd}
=> \frac{a+c}{b+d} = \frac{ma+nc}{mb+nd}
Hence option [D] is correct answer.

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