question_answer

The price of pure mustard oil is Rs. 100 per litre. A shopkeeper adulterates it with some other types of oils at Rs. 50 per litre. He sells the mixture at the rate of Rs. 96 per litre so as to gain 20 % on the whole transaction. The ratio in which he mixed the two oils is:

A)  1 : 2                            

B)  2 : 3

C)  3 : 2    

D)  1 : 4

E)  None of these