Find the compound ratio of 7:3 and 4:11.

 a) 5: 3
 b) 7 : 11
 c) 28 : 33
 d) 33 : 21
NDA-2015

28 : 33
Solution
compound ratio of 7:3 and 4:11 = 7x4 : 3x11 = 28 : 33 /
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