The ratio of boys and girls among 520 students of class A and 930 students of class B is 7 : 6 and 16 : 15. respectively. The ratio of girls to the total students combined for classes A & B is?
Answer & explanation
Correct answer: option 2
Class A → B : G
7 : 6 = 13
↓ ↓
×40 ×40
240 520
Class B → B : G
16 : 15 = 31
↓ ↓
×30 ×30
450 930
Total girls in class A and Class B = 240 + 450 = 690
Total students in both classes = 520 + 930 = 1450
Required Ratio = 690 : 1450
= 69 : 145