Multiple choice

The price of a variety of a commodity is Rs. 7/kg and that of another is Rs. 12/kg. Find the ratio in which two varieties should be mixed so that the price of the mixture is Rs. 10/kg.

  1. 2 : 5

  2. 2 : 3

  3. 3: 4

  4. 4: 5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using the alligation method: First variety at Rs. 7/kg, target price Rs. 10/kg, second variety at Rs. 12/kg. The ratio is |12-10| : |10-7| = 2 : 3. Verification: (2×7 + 3×12)/(2+3) = (14+36)/5 = 50/5 = 10.

Keep practicing — related questions