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Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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by sanju09 » Fri May 07, 2010 3:07 am
A certain electric-company plan offers customers reduced rates for electricity used between 8 p.m. and 8 a.m. weekdays and 24 hours a day Saturdays and Sundays. Under this plan, the reduced rates apply to what fraction of a week?
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by GauravMalhotra » Fri May 07, 2010 4:13 am
12 hours for 5 days = 60 hours
24 hours for 2 days = 48 hours

Total hours in a week = 7 * 24 = 168

Fraction is - 108/168 or 27/42
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by sanju09 » Fri May 07, 2010 4:28 am
GauravMalhotra wrote:12 hours for 5 days = 60 hours
24 hours for 2 days = 48 hours

Total hours in a week = 7 * 24 = 168

Fraction is - 108/168 or 27/42 = [spoiler]9/14[/spoiler]
[spoiler]9/14[/spoiler]? how many votes?
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by hephzi_bah » Fri May 07, 2010 6:06 pm
sanju09 wrote:
GauravMalhotra wrote:12 hours for 5 days = 60 hours
24 hours for 2 days = 48 hours

Total hours in a week = 7 * 24 = 168

Fraction is - 108/168 or 27/42 = [spoiler]9/14[/spoiler]
[spoiler]9/14[/spoiler]? how many votes?
Well I think this is a short way:

5 days times one half = 5/2
2 days times one =2
from 7 days means

(5/2+2)/7 = 9/14

Sincerely
Alberto Vidal
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