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In what ratio must a mixture of 30% alco...

In what ratio must a mixture of 30% alcohol strength be mixed with that of 50% alcohol strength so as to get a mixture of 45% alcohol strength? (A) `1 : 2` (B) `1 : 3` (C ) `2 : 1` (D) `3 : 1`

A

A

B

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C

B

D

D

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