Rice at ₹50 per kg is mixed with rice at ₹65 per kg, and the mixture is sold at ₹66 per kg for a profit of 10%. In what ratio were the two mixed?

Explanation

1. 01

   First take out the profit: cost price of the mixture $= \frac{66 \times 100}{110} = 60$ rupees per kg.

2. 02

   Then alligate: cheaper : dearer $= (65 - 60) : (60 - 50) = 5 : 10 = 1 : 2$.