Practice MCQ Questions and Answer on Alligation
81.
In what ratio must tea at Rs. 62 per kg be mixed with tea at Rs. 72 per kg so that the mixture must be worth Rs. 64.50 per kg?
- (A) 3 : 1
- (B) 3 : 2
- (C) 4 : 3
- (D) 5 : 3
82.
From a container, full of pure milk, 20% is replaced by water and this process is repeated three times. At the end of third operation, the quantity of pure milk reduces to:
- (A) 40.0%
- (B) 50.0%
- (C) 51.2%
- (D) 58.8%
83.
3 L water is taken out from vessel full of water and substituted by pure milk. This process is repeated two more times. Finally, the ratio of milk and water in the solution becomes 1728 : 27. Find the volume of the original solution.
- (A) 3 L
- (B) 5 L
- (C) 4 L
- (D) 9 L
84.
To gain 10% on selling sample of milk at the cost price of pure milk, the quantity of water to be mixed with 50 kg. of pure milk is:
- (A) 2.5 kg
- (B) 5 kg
- (C) 7.5 kg
- (D) 10 kg
85.
A mixture of milk and water measures 60 litres. It contains 10% water. How much water should be added to it, so that the water may be 25%?
- (A) 18 litres
- (B) 14 litres
- (C) 16 litres
- (D) 12 litres
86.
Nikita bought 30 kg of wheat at the rate of Rs. 9.50 per kg and 40 kg of wheat at the rate of Rs. 8.50 per kg and mixed them. She sold the mixture at the rate of Rs. 8.90 per kg. Her total profit or loss in the transaction was -
- (A) Rs. 2 loss
- (B) Rs. 2 profit
- (C) Rs. 7 loss
- (D) Rs. 7 profit
87.
In what ratio must a grocer mix two varieties of pulses costing Rs. 15 and Rs. 20 per kg respectively so as to get a mixture worth Rs. 16.50 kg?
- (A) 3 : 7
- (B) 5 : 7
- (C) 7 : 3
- (D) 7 : 5
88.
The respective ratio of milk and water in the mixture is 4 : 3. If 6 litres of water is added to this mixture, the respectively ratio of milk and water becomes 8 : 7. What is the quantity of milk in the original mixture ?
- (A) 36 litres
- (B) 84 litres
- (C) 48 litres
- (D) None of these
89.
In what ratio must 45% grape juice be mixed with that of 25% grape juice so as to get a mixture of 40% grape juice?
- (A) 4 : 1
- (B) 3 : 1
- (C) 4 : 3
- (D) 2 : 3
90.
In 2 kg mixture of copper and aluminium, 30% is copper. How much aluminium powder should be added to the mixture so that the quantity of copper becomes 20% ?
- (A) 900 gms
- (B) 800 gms
- (C) 1000 gms
- (D) 1200 gms