Question 13

The marked price of a book is Rs 4200. The shopkeeper gives two successive discounts of 25% and y% to the customer. If the customer pays Rs 2898 for the book, then what is the value (in percentage) of y?

Solution

Marked price = Rs. 4200

After first discount of 25%, price of pen = $$4200-(\frac{25}{100}\times4200)$$

= $$4200-1050=Rs.$$ $$3150$$

After 2nd discount of $$y\%$$, price = $$3150-(\frac{y}{100}\times3150)=2898$$

=> $$31.5y=3150-2898$$

=> $$31.5y=252$$

=> $$y=\frac{252}{31.5}=8\%$$

=> Ans - (B)

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