MCQ on Ratio and Proportion

11-If A:B=2:5 and B:C=4:1, then find A:B:C

(A) 2:9:1

(B) 4:18:3

(C) 4:9:2

(D) 8:20:5

 

12- If 0.75:x::5:8. Then x is equal to

(A) 1.15

(B) 1.20

(C) 1.22

(D) 1.28

 

13-A bag contains one rupee, 50-paise and 25 paise coins in the ratio 5:6:7. If the total amount is Rs. 390, find the number of coins of each kind

(A) 200, 260, 220

(B) 240, 200, 260

(C) 200, 240, 280

(D) 260, 220, 200

 

14- Weekly income of two persons are in the ratio of 7:3 and their weekly expenses are in the ratio of 5:2. If each of them saves Rs. 300 per week, then the weekly income of the first person is

(A) Rs. 4,400

(B) Rs. 5,200

(C) Rs. 6,300

(D) Rs. 7,500

 

15-If A : B = 2 : 3, B : C = 4 : 5, C : D = 6 : 7 then find A : B : C : D

(A) 16 : 22 : 20 : 35

(B) 16 : 24 : 15 : 35

(C) 16 : 24 : 30 : 35

(D) 18 : 24 : 30 : 35

 

16-If 30% of (B-A) is equal to 18% of (A+B) then the ratio A:B is equal to

(A) 1:2

(B) 1:3

(C) 1:4

(D) 3:1

 

17-30% of x is equal to 60% of y the x : y is

(A) 1:2

(B) 2:1

(C) 1:3

(D) 3:1

 

18-20 litres of a mixture contain milk and water in the ratio 5:3. If 4 litres of this mixture are replaced by 4 litres of milk, the ratio of milk to water in the new mixture will become

(A) 2:1

(B) 1:2

(C) 7:3

(D) 8:3

 

19-If x : y = 3 : 5 then (5x + 3y) : (15x – 2y) is

(A) 1 : 5

(B) 5 : 1

(C) 6 : 7

(D) 7 : 6

 

20-A mixture contains alcohol and water in the ratio 4 : 3. If five litres of water is added to the mixture, the ratio becomes 4 : 5. Find the quantity of alcohol in the given mixture.

(A) 5 liters

(B) 7.5 liters

(C) 10 liters

(D) 12.5 liters

 

ANSWERS:

11-(D), 12-(B), 13-(C), 14-(C), 15-(C), 16-(C), 17-(B), 18-(C), 19-(C), 20-(C)