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rolls of paper towels

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by sanju09 » Tue Oct 18, 2011 5:20 am
A case of 12 rolls of paper towels sells for $9. The cost of one roll sold individually is $1. What is the percent of savings per roll for the 12-roll package over the cost of 12 rolls purchased individually?
(A) 9
(B) 11
(C) 15
(D) 25
(E) 90
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by zooki » Tue Oct 18, 2011 5:49 am
Buying 12 roll you save 12-9=$3 = 3/12= 1/4= 25%
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by neelgandham » Tue Oct 18, 2011 6:11 am
12 rolls(as a bundle) - $9
12 rolls(separate) - $12
Savings - $3

Savings % = ($3/$12)*100 = 25%
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by Abhishek009 » Tue Oct 18, 2011 6:25 am
sanju09 wrote:A case of 12 rolls of paper towels sells for $9. The cost of one roll sold individually is $1. What is the percent of savings per roll for the 12-roll package over the cost of 12 rolls purchased individually?
(A) 9
(B) 11
(C) 15
(D) 25
(E) 90
Cost if a pack of 12 rolls is bought at a time = $9

Cost of 12 rolls is bought one at a time = $12

Saving made by purchasing the rolls ( As a pack ) = $3

Now % Savings made = { Savings Made/Cost incurred purchasing the roll ( Singly ) }*100%

=> ( 3/12 )*100% = 25%
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