If the SP of $10$ pens is equal to the CP of $11$ pens, find the profit percent.
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If the SP of $10$ pens is equal to the CP of $11$ pens, find the profit percent.
10 * SP = 11 * CP. SP/CP = 11/10 = 1.1. Profit = 10%.
Let the cost price of one pen be 1, making the cost price of 11 pens equal to 11. Since the selling price of 10 pens equals the cost price of 11 pens, the selling price of 10 pens is also 11. This means the selling price of one pen is 1.1, giving a profit of 0.1 per pen. Using the profit percentage formula, the profit is 0.1 divided by 1 multiplied by 100, resulting in a 10 percent profit.