engineering recuitment AAI JE Technical Mock Test 2020-21 Quantitative Aptitude Ratio and Proportion Compound Ratios
If compound ratio of 3 : 4 and 5 : 6 is a and compound ratio of 2 : 3 and 4 : 5 is b, then ratio of a : b is:
1
71 : 47
2
85 : 87
3
21 : 34
4
75 : 64