Arif bought 17 pens of three colors black , green and red. They cost Tk 5,Tk 10 and Tk 25 each respectively . The total amount that Arif paid was Th 205. If Arif bought twice as many green pens as red pens ,how many black pens did buy ?
A. 4
B. 5
C. 7
D.
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সঠিক উত্তরঃ
B.
5
Explanation:
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