Ashok has two such types of wheat at Rs 60 per kg and Rs 85 per kg. If he makes 20% profit by selling his mixture at Rs. 84 per kg, what will be the ratio of these types in the mixture?

Correct option is B

Given
CP of Type 1 = Rs. 60/kg
CP of Type 2 = Rs. 85/kg
SP of Mixture = Rs. 84/kg
Profit =$$20\%$$​​

Formula Used
CP of Mixture = $$\frac{SP}{1 + \frac{P\%}{100}}$$​​

Solution
CP of Mixture = $$\frac{84}{1.20} = Rs. 70/kg$$​​
Using Rule of Alligation:

Type 1 (60) ................. Type 2 (85)
................. Mean (70) .................
Diff: (85-70)=15 .......... (70-60)=10
Ratio = 15 : 10 = 3 : 2

Final Answer
So the correct answer is (b)