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Two alloys cotain Tin and Iron in the r...

Two alloys cotain Tin and Iron in the ratio of `1:2and2:3` if the two alloys are mixed in the proportion of `3:4` repectively (by weight), the ratio of Tin and Iron in the newly formed alloy is :

A

`14 : 25`

B

`10 : 21`

C

`12 : 23`

D

`13 : 22`

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