A trader allows a discount of 10% on the marked price of an article and thus gains 17% on the cost price of the article .If the cost price is increased by 10 % ,how much discount percent should be allowed on the marked price so as to earn the same percentage of profit.
Students attend our lectures, not because the mathematics we teach ‘makes lots of fun’ for us, but because they believe they can learn some essential knowledge from us. And each of our young students has only one life to live. We should therefore be a