In what ratio must a person mix three kinds of musted seeds costing Rs.65/kg, Rs.70/kg and Rs.105 /kg so that the resultant mixture when sold at Rs.96/kg yields a profit of 20%? a) 1:2:4 b) 3:7:6 c) 1:4:2 d)1:8:6 e) 40 : 8 : 25
E
The resultant mixture is sold at a profit of 20% at Rs.96/kg
i.e. 1.2 (cost) = Rs.96 => Cost = = Rs.80 / kg.
Let the three varities be A, B, and C costing Rs.65, Rs.70 and Rs.105 respectively.
The mean price falls between B and C.
Hence the following method should be used to find the ratio in which they should be mixed.
A:C=4:5 B:C=2:5
The resultant ratio A : B : C :: 40 : 8 : 25.