গাণিতিক যুক্তি MCQ
A and B are two alloys of gold and copper prepared by mixing metals in the ratios 7 : 2 and 7 : 11 respectively. If equal quantities of the alloys are melted to form a third alloy C, then the ratio of gold and copper in alloy C will be -
সঠিক উত্তর
7 : 5