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05 Jul 2013, 07:50
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
82% (02:30) correct
18%
(02:49)
wrong
based on 97
sessions
History
Date
Time
Result
Not Attempted Yet
Keri, Neill, and Rich use toilet paper in their apartment in a ratio of 3:2:2. Rich buys two cases of toilet paper online for everyone`s use at 28 rolls per case, an average of $3.50/roll and a $14 delivery charge. If they each contribute to the cost of the toilet paper in direct proportion to the amount they use, how much must Keri contribute?
A. 87
B. 88
C. 89
D. 90
E. 92
A. 87
B. 88
C. 89
D. 90
E. 92
05 Jul 2013, 08:05
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antoxavier
Two cases = 28*2 = 56 rolls.
Cost = 56*$3.5 + $14 = $210.
Keri's share = 3/(3+2+2) = 3/7.
Thus Keri must contribute 3/7*$210 = $90.
Answer: D.
Hope it's clear.
Dream2020
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20 Nov 2018, 00:52
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Answer:
2 casex28 = 56 rolls..
56 rollsx 3.50 = 196
Add $14 delivery
Total 210$
Keri will pay 3/7th of total cost
That is 3/7 x 210= 90
Posted from my mobile device
2 casex28 = 56 rolls..
56 rollsx 3.50 = 196
Add $14 delivery
Total 210$
Keri will pay 3/7th of total cost
That is 3/7 x 210= 90
Posted from my mobile device
