Melissa spent 3/8 of her money on 3 pencils and 8 pens, and 4/5 of the remainder on 15 markers. Each pencil cost 2/3 as much as a pen. Each marker cost $0.20 more than a pencil. What is the cost of a pen?
Solution
40 units – 30 units ----- $3
10 units ----- $3
1 unit ----- $3 divided by 10 = $0.30
(Pen) 3 units ----- $0.30 x 3 = $0.90
Answer: $0.90
Tuesday, September 22, 2009
Raffles Girls Pri Sch 2007 PSLE Math Prelim Q47
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