Ratio and Proportion TNPSC Group 4 VAO Questions

Ratio and Proportion MCQ Questions

1.

In a mixture of 60 litres, the ratio of milk and water is 2 : 1. If this ratio is to be 1 : 2, then what is the quantity of water to be further added?

 Group 1 - 2015

A.

20 L

B.

30 L

C.

50 L

D.

60 L

ANSWER :

D. 60 L

2.

In a mixture of 28 litres, the ratio of milk and water is 5 : 2. If 2 litres of water is added to the mixture, find the ratio of milk and water in the new mixture.

 Group 2 - 2013

A.

2 : 1

B.

1 : 2

C.

2 : 3

D.

1 : 3

ANSWER :

A. 2 : 1

3.

One lite of water is added to 5 liters of a 20% solution of alcohol in water. The strength of alcohol in the new solution is

 Group 2 - 2013

A.

16⅔%

B.

15%

C.

20%

D.

16%

ANSWER :

A. 16⅔%

4.

The ratio of boys to girls in a class is 4:5. If the number of boys is 20, then the number of girls is

 Group 2 - 2018

A.

15

B.

20

C.

25

D.

26

ANSWER :

C. 25

5.

If x2 + 4y2 = 4xy, then x : y is

 Group 2A - 2016

A.

2 : 1

B.

1 : 2

C.

1 : 1

D.

1 : 4

ANSWER :

A. 2 : 1

6.

What is the third proportional to 0.34 and 0.50?

 Group 1 - 2015

A.

0.74

B.

0.75

C.

0.76

D.

0.77

ANSWER :

A. 0.74