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If a :(b+c)=1:3\ a n d\ c :(a+b)=5:7,\ t...

If `a :(b+c)=1:3\ a n d\ c :(a+b)=5:7,\ t h e\ b :(a+c)` is equal to `1:2` b. `1:3` c. `2:3` d. `2:1`

A

`1:2`

B

`2:3`

C

`1:3`

D

`2:1`

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A
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