A shopkeeper has 280 kg of apples. He sells 40% of these at 20% profit and remaining 60% at 20% profit. Find his % profit on total.	Answers:
A) 24 %  B) 20 %  C) 26 %  D) 28 %  E) 35 %

Rationale: "if the total quantity was 100 then 40 x 20 % + 60 x 20 % = 20 this profit will remain same for any total quantity unless the % of products remains the same . hence ' b ' is the answer"
Answer: B