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If a : b = 2 : 3, then (3a+4b)/(4a+5b) i...

If a : b = 2 : 3, then `(3a+4b)/(4a+5b)` is equal to :
यदि a : b = 2 : 3, तो `(3a+4b)/(4a+5b)` बराबर है:

A

`6 : 7`

B

` 20 : 23 `

C

`19 : 23`

D

`18 : 23`

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