1 .	Two alloys are made up of both 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
Answer : Option B Explanation :
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