Maria Purchased brand X pens for Tk. 4.00 apiece and brand Y pens for Tk. 2.80 apiece. If Maria purchased a total of 12 of those pens for Tk. 42.00 ,how many brand x pens did she purchase?
A. 4
B. 5
C. 6
D. 7
E. None of them
সঠিক উত্তরঃ
D.
7
Explanation:
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