Question

Pure ghee costs Rs. 100 per kg. After adulterating it with vegetable oil costing Rs. 50 per kg, a shopkeeper sells the mixture at the rate of Rs. 96 per kg, thereby making a profit of 20%. In what ratio does he mix the two ?

• A. 1 : 2
• B. 3 : 2
• C. 3 : 1
• D. None of these

Answer 1

The correct option is B 3 : 2

Mean price =
$Rs.(\frac{100}{120}\times 96)$
​​​​​​​
By the rule of alligation :


$\therefore$ Required ratio = 30 : 20 = 3 : 2.