Mixtures and Alligation Questions

Multiple choice
  1. 2:3:15

  2. 8:12:15

  3. 12:18:25

  4. 6:9:11

  5. Culture influences choice making. Individualistic societies are taught the importance of personal choice while collectivist societies emphasize that what you eat, what you play with, what you study etc should be determined by society and should not be left to the whims of the individual.

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let the ratio in M be A:B:W = a:b:w. Total parts = a+b+w. Lab P result (2:3:5) implies water increased. Lab Q result (6:9:10) implies water decreased. Solving the system of equations based on the volume changes leads to the ratio 6:9:11.

Multiple choice
  1. 2.5

  2. 3

  3. 3.5

  4. 4

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let the density of B be d, so the density of A is 2d. Initially, the mixture has volume 70/(2d) + 30/d = 65/d. After t hours, its mass is 100 - 3t and volume is (65 - 2.5t)/d; setting the density ratio to 1.04 gives t = 4 hours.

Multiple choice
  1. If the question can be answered by any one of the 2 statements alone but not by the other alone.

  2. If the question can be answered by using either of the 2 statements alone.

  3. If the question can be answered by using the 2 statements together.

  4. If the question cannot be answered by using the given statements.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

I: 25L water in 150L total means 125L milk. Profit % = (25/125)*100 = 20%. II: 15L water costing 40% of milk price added to 135L milk. This is also solvable. Both statements are sufficient alone.

Multiple choice
  1. 1 : 1

  2. 1 : 16

  3. 5 : 16

  4. 16 : 5

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Initially: A=750 compound, B=250 water. 200ml A to B: A has 550 compound, B has 200 compound + 250 water (total 450). Concentration in B = 200/450 compound, 250/450 water. 90ml from B to A: 90 * (200/450) = 40 compound, 90 * (250/450) = 50 water. A now has 550+40=590 compound, 50 water. B now has 450-90=360 total (160 compound, 200 water). Ratio of water in A (50) to compound in B (160) = 50:160 = 5:16.

Multiple choice
  1. 2.2 litres

  2. 2.4 litres

  3. 4.4 litres

  4. 5.8 litres

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Container A: 20% of 35L = 7L (2.8L X, 4.2L water). Container B: 30% of 35L = 10.5L (4.5L Y, 6L water). Total mixture = 17.5L. Total X+Y = 7.3L. Targeted concentration 1/3 means 7.3L is 1/3 of total volume. Total volume = 21.9L. Water needed = 21.9 - 17.5 = 4.4L.

Multiple choice
  1. 36 litres of Solution A and 78 litres of Solution B

  2. 49 litres of Solution A and 65 litres of Solution B

  3. 65 litres of Solution A and 49 litres of Solution B

  4. 66 litres of Solution A and 68 litres of Solution B

  5. a

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let x be the amount of Solution A and y be the amount of Solution B. x + y = 114. Alcohol in A = 2/7, in B = 5/13. Mixture ratio 13:25 means alcohol is 13/38. (2/7)x + (5/13)y = (13/38) * 114 = 39. Solving the system: x + y = 114 => y = 114 - x. (2/7)x + (5/13)(114 - x) = 39. Multiply by 91: 26x + 35(114 - x) = 3549. 26x + 3990 - 35x = 3549. -9x = -441. x = 49. y = 114 - 49 = 65.

Multiple choice
  1. 30 litres of the first mixture, 30 litres of the second mixture

  2. 15 litres of the first mixture, 45 litres of the second mixture

  3. 12 litres of the first mixture, 48 litres of the second mixture

  4. 20 litres of the first mixture, 40 litres of the second mixture

  5. a

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let M1 be the first mixture and M2 be the second. M1 has X:Y = 2:5. M2 has Y:Z = 3:4. To combine, we need a common Y. M1: X:Y = 6:15. M2: Y:Z = 15:20. Thus, M1 has X:Y:Z = 6:15:0 and M2 has X:Y:Z = 0:15:20. Let a be volume of M1 and b be volume of M2. Total X = (6/21)a. Total Z = (20/35)b = (4/7)b. We want X/Z = 1/2. (6/21)a / (4/7)b = 1/2 => (2/7)a / (4/7)b = 1/2 => a/2b = 1/2 => a = b. Since a+b = 60, a=30 and b=30.

Multiple choice
  1. 50 ml of the first solution and 40 ml of the second solution

  2. 40 ml of the first solution and 60 ml of the second solution

  3. 45 ml of the first solution and 55 ml of the second solution

  4. 55 ml of the first solution and 35 ml of the second solution

  5. a

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let x and y be the initial volumes. The amount of alcohol is 0.3x + 0.6y. After spilling, the remaining volumes are (x-50) and (y-30), and the mixture is 0.3(x-50) + 0.6(y-30) = 0.45(x-50 + y-30). Solving this linear equation with the constraints provided in the options confirms that 55 and 35 satisfy the conditions.

Multiple choice
  1. 30 ml

  2. 90 ml

  3. 120 ml

  4. 130 ml

  5. 150 ml

Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice
  1. 150 ml of A, 200 ml of B, and 205.5 ml of C

  2. 100 ml of A, 110.5 ml of B, and 140 ml of C

  3. 120 ml of A, 118.5 ml of B, and 240 ml of C

  4. 100 ml of A, 112.5 ml of B, and 300 ml of C

  5. a

Reveal answer Fill a bubble to check yourself
D Correct answer
Multiple choice
  1. 13 : 24

  2. 3 : 4

  3. 51 : 64

  4. 43 : 56

Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice
  1. Both Statement I and Statement II are true.

  2. Both Statement I and Statement II are false.

  3. Statement I is true, but Statement II is false.

  4. Statement I is false, but Statement II is true.

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement I: Using alligation, (20 - 16.5) / (16.5 - 15) = 3.5 / 1.5 = 7/3. This is true. Statement II: Using alligation for 1000kg, (16 - 14) / (14 - 8) = 2/6 = 1/3. Total parts = 4. 1 part = 250kg. The quantity at 16% is 3 parts = 750kg. This is true.

Multiple choice
  1. 5 liters, 10 liters

  2. 4 liters, 11 liters

  3. 5.45 liters, 9.55 liters

  4. 6.54 liters, 8.46 liters

  5. 3.54 liters, 10.46 liters

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let x be volume from container 1 and y be volume from container 2. x + y = 15. Orange juice: 0.3x + 0.4y = (4/11) * 15. Solving the system: x + y = 15 and 0.3x + 0.4y = 5.4545. 0.3x + 0.4(15-x) = 5.4545 -> 6 - 0.1x = 5.4545 -> 0.1x = 0.5455 -> x = 5.455, y = 9.545.

Multiple choice
  1. The data in statement I alone is sufficient to answer the question, while the data in statement II alone is not sufficient to answer the question.

  2. The data in statement II alone is sufficient to answer the question, while the data in statement I alone is not sufficient to answer the question.

  3. The data in either statement I alone or statement II alone is sufficient to answer the question.

  4. The data in both statements I and II together is not sufficient to answer the question.

  5. The data in both statements I and II together is necessary to answer the question.

Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice
  1. Rs. 50

  2. Rs. 30

  3. Rs. 38

  4. Rs. 40

  5. a

Reveal answer Fill a bubble to check yourself
C Correct answer