यदि (3a + 7b) : (3a - 7b) = 4 : 1 हो, तो...

यदि (3a + 7b) : (3a - 7b) = 4 : 1 हो, तो a : b का मान है |

A

`(9)/(35)`

B

`(35)/(9)`

C

`(16)/(25)`

D

`(25)/(16)`

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