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If x : y = 3 :4 then (7x + 3y) : (7x - 3...

If `x : y = 3 :4` then `(7x + 3y) : (7x - 3y)` = ?

A

`5:2`

B

`4:3`

C

`11:3`

D

None of these

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The correct Answer is:
C
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