A. 12%
B. 14%
C. 15%
D. 18%
C. 15%
Market price of a watch = Rs. 720
After 1st discount = 90% of 720
After 1st discount = 90/100×720
After 1st discount = Rs. 648
Cost price of watch = Rs. 550.80
Difference = 648 – 550.80
Difference = Rs. 97.20
2nd discount = (97.20/648)×100
2nd discount = 9720/648
2nd discount = 15%
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