In what ratio must a shopkeeper mix two types of rice worth ₹60/kg and ₹80/kg, respectively, so that, the average cost of the mixture is ₹75/kg?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 1 : 3.
Cheaper = 60, Dearer = 80, Mean = 75
Difference (80 − 75) = 5
Difference (75 − 60) = 15
Ratio = 5 : 15 = 1 : 3
So, rice must be mixed in the ratio 1 : 3.