question_answer

How many kg of salt at 40 paise per kg must a man mix with 20 kg of salt at 22 paise per kg so that he may, on selling the mixture at 36 paise per kg, gain 20% on the outlay?

A)  14 kg                           

B)  18 kg               

C)    13 kg   

D)    17 kg        

E)  16 kg

Correct Answer: E

Solution :

Average cost price\[=36\times \frac{100}{120}\] = 30 paise Now, by alligation method