The following line graph shows the profit and discount percentage of five different articles A, B, C, D and E.

Note:

1) To find the value of x solve the quadratic equation x² - 5x - 150 = 0 (consider positive value only)

2) The average cost price of all the articles A, B, C, D and E is Rs.400.

3) Cost price of article D is Rs. 500 and the marked price of article D is Rs. 1750.

4) Cost price of C and E are in the ratio 1: 2.

5) Selling price of articles A and B are Rs. 240 and Rs. 460 respectively.