Mixtures and Alligation Questions

Multiple choice
  1. The quantity of water is more than the quantity of liquid A.

  2. The quantity of liquid B is less than the quantity of water.

  3. The quantity of liquid A is more than the quantity of liquid B.

  4. None of these.

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

Beaker I: W:A = 1:3 (total 4 parts). Beaker II: W:B = 1:2 (total 3 parts). Mixed in ratio 3:4. Let volumes be 3 and 4. Beaker I: Water = 3 * 1/4 = 0.75, A = 3 * 3/4 = 2.25. Beaker II: Water = 4 * 1/3 = 1.33, B = 4 * 2/3 = 2.67. Total Water = 2.08, A = 2.25, B = 2.67. A < B, W < A, W < B. None of the provided statements A, B, or C are true.

Multiple choice
  1. 1 : 4

  2. 2 : 7

  3. 5 : 13

  4. 4 : 17

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

Let the first mixture have 2x lemon and 5x soda. Adding this to pure soda in a 2:1 ratio means taking 2 parts of the mixture (4x lemon, 10x soda) and 1 part soda (let's say 3y soda). However, the problem implies adding the mixture and soda in a 2:1 ratio by volume; if we take 2 units of the mixture and 1 unit of soda, we have 4 units of lemon and 10+5=15 units of soda (since the mixture is 2/7 lemon and 5/7 soda). The ratio 4:15 is not listed, but if we interpret the ratio as 2 parts mixture to 1 part soda, the calculation leads to 4:17.

Multiple choice
  1. 4.25

  2. 4.4

  3. 4.45

  4. 4.5

Reveal answer Fill a bubble to check yourself
B Correct answer
Multiple choice
  1. 80%

  2. 125%

  3. 140%

  4. 150%

Reveal answer Fill a bubble to check yourself
B Correct answer
Multiple choice
  1. 4 : 9

  2. 1 : 3

  3. 5 : 9

  4. 1 : 2

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

Let initial coffee be 1. After two removals of fraction 'x', coffee remaining = (1-x)^2. Given (1-x)^2 = 16/25 (since coffee:cocoa is 16:9, total is 25). So 1-x = 4/5, x = 1/5. In mixture P, coffee = 4/5, cocoa = 1/5. In mixture Q, coffee = 16/25, cocoa = 9/25. Ratio of cocoa in P to Q = (1/5) / (9/25) = 5/9.

Multiple choice
  1. 21

  2. 24

  3. 16

  4. 17

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

Mixture A: 3/5 cocoa, 2/5 sugar. Mixture B: 7/10 coffee, 3/10 sugar. Combined in 2:3 ratio: Sugar = (2/5 * 2/5) + (3/5 * 3/10) = 4/25 + 9/50 = 8/50 + 9/50 = 17/50 (34%). Mixing with equal milk halves the concentration: 34% / 2 = 17%.

Multiple choice
  1. 12.5%

  2. 25%

  3. 29.17%

  4. 58.33%

  5. na

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

Mixture X has orange juice in ratio 3/5. Mixture Y has orange juice in ratio 4/7. Combining X and Y in 5:7 ratio: Total orange = (5 * 3/5 + 7 * 4/7) / (5 + 7) = (3 + 4) / 12 = 7/12. Diluting with equal water means the new total volume is doubled, so orange juice percentage is (7/12) / 2 = 7/24, which is approximately 29.17%.

Multiple choice
  1. 9 litres

  2. 10 litres

  3. 11 litres

  4. 13 litres

  5. 15 litres

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

Initial: 80L, X:Y = 3:5 (30L X, 50L Y). After adding Y, ratio 3:7. Since X is 30, Y must be 70. Added 20L Y. Total 100L. Remove 1/5 (20L), remaining 80L (30:70 ratio, 24L X, 56L Y). Target 5:8 ratio. (24+k)/56 = 5/8 => 8(24+k) = 280 => 192 + 8k = 280 => 8k = 88 => k = 11.

Multiple choice
  1. 20%

  2. 8⅓%

  3. 15%

  4. 16⅔%

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

Let initial amounts be x. After transferring y from A to B, A has (x-y) juice, B has y juice and x water. After transferring y of the mixture (which has concentration y/(x+y) juice) back to A, the concentrations equalize. The math leads to the concentration of juice in B being 16 2/3%.