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The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of-

The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of- Correct Answer 19

Let the price of the TV set be S. Price after 10% discount = S - 10% of S = 0.9S Price after another 10% successive discount = 0.9 - 10% of 0.9S = 0.09S = 0.81S Actual discount = (S - 0.81S)/S×100% = 19%

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