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1. On selling 17 balls at Tk. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is ----
- A. Tk. 45
- B. Tk. 45
- C. Tk. 45
- D. Tk. 45
Answer: Option D
Explanation:
C.P of balls - S.P of 17 balls = C.P of 5 balls
C.P of 17 balls - C.P of 5 balls = S.P of 17 balls
C.P of 12 balls = 720
C.P of 1 ball = 720/12 = 60
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