question_answer

A merchant has 100 kg of sugar, part of which he sells at 7% profit and the rest at 17% profit. If he gains 10% on the whole, the amount sold at 7% profit is

A) 40 kg                

B) 35 kg

C) 70 kg    

D) 60 kg

Correct Answer: C

Solution :

Average rate of profit = 10 % Two parts should be in the ratio = 7 : 3 Amount sold at 7% profit             \[=\frac{7}{10}\times 100=70\,kg\]