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A shopkeeper gives discount of 10% on the marked price of a transistor but in the bargain makes a profit of 10%. If the market price of the transistor be Tk. 330 the cost is:

A. Tk. 300
B. Tk. 350
C. Tk. 360
D. Tk. 270
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সঠিক উত্তরঃ D. Tk. 270
Explanation: