A shopkeeper wanted to sell ₹3,000 worth of products. He gave two options — giving three successive discounts of 10% each, or giving a single discount of 30%. If a buyer chooses the former option how much extra/less does he pay as compared to the second option?

₹87 extra

Marked price of the product = 3,000 

Three successive discounts of = 10% are given

SP = 3000 × \(\frac{9}{10}\)  × \(\frac{9}{10}\)  × \(\frac{9}{10}\) = 2187

SP at single discount of 30% = 70% of 3000 = 2100

So he has to pay 2187 - 2100 = 87 extra.