Arithmetichard · Past Paper

A shopkeeper gives a discount of 10% on MP and still makes a profit of 10%. Find the ratio of CP to MP.

A9:11
B11:9
C1:1
D10:11

✓ Correct Answer: A9:11

SP = 0.9 MP and SP = 1.1 CP. 0.9 MP = 1.1 CP => CP/MP = 0.9 / 1.1 = 9/11.

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