Mixture and Alligation For SBI PO Set 1

Mixture and Alligation For SBI PO Set-1

1. The average marks of 10 students of a class is 80 and the average marks of 12 student of another class is 75, what is the average marks per student of both the classes taken together?

a) 66

b) 65

c) 67.78

d) 77.27

2. Dohni borrowed a total of Rs 5 lakhs, partly from a bank at 8% p.a., S. l. and partly from a friend at 10% p.a. S> I> if the total interest paid by him annually is Rs 46000 then find the amount that he borrowed from his friend.

a) 3lakhs

b) 2lakhs

c) 1.5lakhs

d) None of these

3. Asha buys a total of 15 litres milk. In the milk bought from shop A, the ratio of milk to water is 3:2 while in the milk bought from shop B, the ratio of milk and water is 4: 1. If the ratio of milk to water, when both the milk [of shop A and shop B ] are mixed in a vessel is 2: 1, the find the quantity of milk bought from shop B.

a) 10litres

b) 5litres

c) 12litres

d) 9litres

4. 48litres of a mixture has 75% alcohol. How much water must be added to it to get 60% alcohol concentration?

a) 12litres

b) 15litres

c) 10litres

d) 8litres

5. Ina 45litres mixture of milk and water, the ratio of milk and water is 2: 1. When some quantity of water id added to a mixture, the ratio becomes 1:2. The quantity of water added is

a) 10 litres

b) 21 litres

c) 35 litres

d) 45 litres

6. A merchant sells a part of his merchandise at a profit of 20 % and rest at loss of 10%. If his overall profit is 5% then find the ratio of first to second part

a) 1:2

b) 3:1

c) 2:3

d) 1:1

7. From a vessel containing 20litres of milk, 4litres of milk is taken out and the vessel is refilled by 4litres of water. The process is repeated for the second and the third time, Find the quantity of milk left in the vessel.

a) 12 litres

b) 8 litres

c) 9 litres

d) None of these

8. Find the ratio in which there qualities of rice costing Rs 75, Rs 70 and Rs 60 per kg should be mixed to produce the mixture worth Rs 65/kg.

a) 2:1:2

b) 3:1:1

c) 5:4:3:

d) None of these

9. Tea at Rs 126 per kg and at Rs 135 per kg are mixed with a third variety in the ratio 1:1:2. If the mixture is worth Rs 153 per kg. the price of the third variety per kg is

a) RS.196.50

b) RS.175.50

c) RS 175

d) Rs 185

10. Moturam halwai buys milk from ramprasad and laxmanprasad. The ratio of milk to water in the mixture sold by both the milkman is 5:3 and 4:3 respectively. Find the ratio in which Moturam should buy milk from both if the ratio of milk to water new mixture is 33:23.

a) 4:3

b) 1:3

c) 2:1

d) 5:4