A shopkeeper bought rice at $11, $16 and $20 per kilogram. He mixes them in the ratio 2: 3: 5 by weight, and sells the

[Vincen]

A shopkeeper bought rice at $11, $16, and $20 per kilogram. He mixes them in the ratio 2: 3: 5 by weight, and sells the mixture at a profit of 40%. At what price per kilogram did the shopkeeper sell the rice?

A. $20.8
B. $21.8
C. $23.8
D. $24.8
E. $26.8

Answer: C

Source: e-GMAT