Find the ratio in which wheat of inferior quality (Rs.14/kg) be mixed with wheat of superior quality (Rs.28/kg) so that the shopkeeper gains Rs.2 by selling the resulting mixture at Rs.20/kg.

Options
- 1 : 3
- 5 : 2
- 3 : 4
- 2 : 5

CORRECT ANSWER : 5 : 2

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