1)

In what ratio, sugar costing Rs.60 per kg be mixed with sugar costing Rs.42 per kg such that by selling the mixture at Rs.56 per kg there is a gain of 12%?

SSC CGL 2019

A)

5 : 6

B)

8 : 9

C)

4 : 5

D)

5 : 7

Correct Option: C

4 : 5

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Selling price of mixture = 56;
profit = 12%;
Cost price of the mixture =\( 56 \times \frac{100}{112}\) = Rs. 50;
By allegation method,

2)

The ratios of copper to zinc in alloys A and B are 3 : 4 and 5 : 9, respectively. A and B are taken in the ratio 2 : 3 and melted to form a new alloy C. What is the ratio of copper to zine in C?

SSC CGL 2019

A)

8 : 13

B)

3 : 5

C)

9 : 11

D)

27 : 43

3)

A vessel contains a 32 litre solution of acid and water in which the ratio of acid and water is 5 : 3, If 12 litres of the solution are taken out and l\(7\frac{1}{2}\)itres of water are added to it, then what is the ratio of acid and water in the resulting solution?

SSC CGL 2019

A)

4 : 7

B)

5 : 6

C)

4 : 9

D)

8 : 11

4)

How many kg of salt costing ₹28 per kg must be mixed with 6.6 kg of salt costing ₹16 per kg, so that selling the mixture at ₹29.90, there is a gain of 15%?

SSC CGL 2019

A)

33

B)

31

C)

35

D)

32

5)

40 litres of 60% concentration of acid solution is added to 35 litres of 80% concentration of acid solution. What is the concentration of acid in the new solution?

SSC CGL 2019

A)

66%

B)

\(66\frac{2}{3}\)%

C)

\(69\frac{1}{3}\)%

D)

69%

6)

Alloy A contains copper and zine in the ratio of 4 : 3 and alloy B contains copper and zine in the ratio of 5: 2. A and B are taken in the ratio of 5 : 6 and melted to form a new alloy. The percentage of zinc in the new alloy is closest to:

SSC CGL 2019

A)

54

B)

34.2

C)

36.8

D)

35