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If x : y=3:4\ a n d\ a : b=1:2, then the...

If `x : y=3:4\ a n d\ a : b=1:2,` then the value of `(2x a+y b)/(3y b-4x a)` is `5/6` b. `6/7` c. `6/5` d. `7/6`

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RS AGGARWAL-RATIO AND PROPORTION-All Questions
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