Maths P5
posted by jo .
Cindy went to the store with just enough money to buy 11 files.However, she bought only 8 files and spent the rest of her money on 24 pens and rulers. The ratio of the number of pens to rulers was 3:5. Each ruler costs $0.80. Each pen costs $0.40 more than a ruler.How much did she spent on the files?

pens  3x
rulers  5x
3x+5x= 24
8x=24
x=3
so she bought 9 pens and 15 rulers
amount spent on pens and rulers = 9(1.20) + 15(.80) = 22.80
money spent on files : money spent on pens&rulers = 8:3
money spent on files/22.8 = 8/3
= 60.80
Respond to this Question
Similar Questions

math
rudy went to the mall to spend some of his money he earned. he spent 1/3 of his money o n a new shirt. He then went to to the music store and bought a cd with 1/3 he had left. At dvds to go he bought a dvd with 1/3 of the money he … 
Math
A pack of 7 pens cost $6 . A pack of 9 files cost $12. Fred wants to buy an equal number of pens and files. What is the least amount that he must pay? 
MATHS
Judy is given some money to buy files. If she buys 5 files, she will have $4 left. If she buys 9 files, she will need another $5. How much money does she have? 
MATHS
Mrs Koh bought some pens, files and erasers. The ratio of the number of pens to the number of files to the number of erasers she bought was 1 : 2 : 3. The cost of each pen and eraser is $2.50 and $0.50 respectively. If she spent $60 … 
math
John and Smith went to a stationery shop. John bought 6 pens, 4 pencils and 3 erasers. Smith bought 3 pens, 8 pencils and 6 erasers and spent 20% more than John. What percentage money did John spend on pens? 
math
A pack of 6 pens cost $30. A pack of 8 files cost $24. A student wants to buy an equal number of pens and files. What is the least amount that the student must pay? 
MATHS
Please help  In a stationery shop, there were pens, erasers and rulers. There were thrice as many pens as erasers and thrice as many erasers as rulers at first.After the shop keeper sold 6 rulers and some erasers there were thrice … 
math
mark went to the department store to buy gifts for his friends. he spent half of his money plus 50 at store A. he then spent half of the remaining money plus 100 at store b at the end he had 250. how much money did he have at the beginning 
Maths
A shopkeeper buys a number of blue pens and red pens. He pack 3 blue pens and 2 red pens into a packets for sale. If he wants to obtain 160 packets of the pens he needs another 25 blue pens. What is the total number of the pens bought … 
Math grade 5, twopart problem
The ratio of the number of lisa's pens to the number of adeline's pens was 2:3 at first.after father gave lisa another 16 pens,the ratio became 2:1 A.how many pens did adeline have?