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 :

`10:21`

`13:22`

`14:25`

`12:23`

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