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Two alloys are both made up of copper an...

Two alloys are both made up of copper and tin. The ratio of copper and tin in the first alloy is 1:3 and in the second alloy is 2:5. In what ratio should the two alloys be mixed to obtain a new alloy in which the ratio of tin and copper be 8:3?

A

`3:5`

B

`4 : 7`

C

`3 : 8`

D

` 5: 11`

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The correct Answer is:
B
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