Quantitative Aptitude Ratio and Proportion Simple Ratios

ಒಂದು ವೇಳೆ \({{a} \over b} : {{7} \over 5}\) , ಆಗ \({{(5a + 4b) } \over 5a - 4b}\) ನ ಮೌಲ್ಯ ಎಷ್ಟು?

1
\({{3} \over 11}\)
2
\({{7} \over 8}\)
3
\({{11} \over 3}\)
4
\({{5} \over 7}\)

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