In the what ratio must a shopkeeper mix 2 types of rice worth₹80/kg and₹100/kg, so that the average cost of the mixture is₹95/kg?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 1 : 3.
₹80 ₹100
\ /
\ /
₹95 (mean)
/ \
₹5 ₹15
Ratio = (Difference between costlier and mean) : (Difference between mean and cheaper)
⇒ (100 - 95) : (95 - 80) = 5 : 15 = 1 : 3