11)

An alloy contains 40% of silver, 30% of copper, and 30% of nickel. How much silver (in kg) should be added to 25 kg of the alloy so that the new alloy contains 50% of silver?

SSC CGL 2022

A)

12

B)

5

C)

20

D)

10

12)

80% and 90% pure acid solutions are mixed to obtain 20 litres of 87% pure acid solution. Find the quantity (in litres) of 80% pure acid solution taken to form the mixture.

SSC CGL 2022

A)

9

B)

6

C)

8

D)

4

13)

A container contains 25 litre of milk. From this container, 5 litre of milk is taken out and replaced by water. This process is further repeated two times. How much milk is there in the container now?

SSC CGL 2022

A)

13.5 litre

B)

14.8 litre

C)

11.5 litre

D)

12.8 litre

14)

P and Q are two alloys of aluminum and copper. The ratios of aluminum and copper in P and Q are 5 ∶ 11 and 3 ∶ 5, respectively. If a third alloy is formed by mixing alloys P and Q in the ratio of 1 ∶ 3, then aluminum is what percentage (rounded off to the nearest integer) of the copper in the third alloy?

SSC CGL 2022

A)

48 Percent

B)

52 Percent

C)

63 Percent

D)

56 Percent

15)

A can of water and milk mixture contains 60% milk. A part of this mixture is replaced by another mixture containing 50% milk and the percentage of milk was found to be 52%. The quantity of mixture replaced is:

SSC CGL 2022

A)

\(4 \over 5\)

B)

\(3 \over 5\)

C)

\(1 \over 5\)

D)

\(2 \over 5\)