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.
Choose the correct option:
A) 5 : 2
B) 5 : 9
C) 5 : 3
D) 5 : 1
E) 5 : 8
Explanation:   Let the resulting mixture be 1 kg, and x kg be the amount of wheat of inferior quality.   Therefore, (1-x)kg is the amount of wheat of superior quality.   5 : 2s the shopkeeper gains Rs.2, the cost of the mixture is Rs.18   14*x + 28*(1-x) = 18   14x - 28x + 28 = 18   14x = 10   x = 5/7   (1 – x) = 2/7   x : (1-x) = 5/7 : 2/7   = 5 : 2   5 : 2NSWER: 5 : 2
<result>A</result>
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.