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A pen is listed for Rs 12. A discount of 15% is given on it. A second discount is given bringing the price down to Rs 8.16. The rate of second discount is:

(a) 15%

(b) 18%

(c) 20%

(d) 25%

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Best answer

Correct option is (c) 20%

M.P. = Rs. 12, discount rate = 15%

∴ Net price after 1st discount = \(\frac{85}{100} \) x 12 = Rs. 10.20

Final selling price = Rs. 8.16

∴ Additional discount = Rs. 10.20 − Rs. 8.16 = Rs. 2.04

∴ Additional discount rate = \(\left(\frac{2.04}{10.20} \times 100\right)\)% = 20%.

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