DAT ❤🎉DAT Math Question of the day! Math Destroyer 20 percent off use discount code take20

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Office manager paid 225.20 $ for 16 post-it notes. If some post-it notes cost 12.50$ each and post-it notes containing company logo each cost 22.4% more. How many post-it notes containing the company logo were bought?
A) 3
B) 15
C) 8
D) 7
E) 9


Answer: E
12.50*1.224 = 15.3$ more was paid for the post-it notes containing company logo

If post it notes that cost 15.30 $ = x, than post-it notes that cost 12.50$ = 16-x

15.30X +12.50(16-X) = 225.20
15.30X + 200 - 12.50X = 225.20
2.80X = 25.20
X = 25.20/2.80 = 9

 

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