Problem: Simon purchased brand X pens for Tk. 4.00 a piece and brand Y pens for Tk. 2.80 a piece. If Simon, purchased a total of 12 of these pens for Tk. 42.00, how many brand Xpens did she purchase?
View all: ESTERN BANK | OFFICER | WRITTEN QUESTION (MATH) | 2005
Correct Answer: she purchased 7 pieces of brand X pens
Explanation:
Let, Brand X pen = p pieces
Brand Y pen = ( 12 — p) pieces
Cost of p pieces = 4 x p = 4p Tk.
Cost of(12 —p) pieces = Tk. (12 —p) x 2.8
According to the question,
4p + (12 —p) 2.8 = 42
4p + 33.6 — 2.8p = 42
4p — 2.8p = 42 — 33.6
1.2p = 8.4
p = 7
So, she purchased 7 pieces of brand X pens.
