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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?

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? Correct Answer 7

Let,    number of X brand pens that she purchased = P         number of Y brand pens that she purchased = 12-Pnow, 4P + 2.80(12-P) = 424P + 33.6 - 2.80P = 421.2P = 8.4P = 7so, number of X brand pens that she purchased = 7 (Ans.)

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