hey can u give me the detailed explanation im just confused

a sports dealer bought 2000hockey sticks for Rs 350 each.10%of them were found to be defective and unfit to be sold.At what price should he sell the remaining to get...

a candidate appearing for an examinations has to secure 40% marks to pass paper 1.But he secured only 40 marks & failed by 20 marks. What is the maximum mark...