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average working hour per day

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by mariah » Tue Dec 28, 2010 8:11 am
for 20 weeks, Mary works x minutes on Monday Wed. Fri. And y minutes on other weekdays.
asked average working Hour per day ?

oa given
[spoiler]3x+4y/420[/spoiler]

pls explain , i m getting wrong answer
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by shovan85 » Tue Dec 28, 2010 8:27 am
mariah wrote:for 20 weeks, Mary works x minutes on Monday Wed. Fri. And y minutes on other weekdays.
asked average working Hour per day ?

oa given
[spoiler]3x+4y/420[/spoiler]

pls explain , i m getting wrong answer
Monday, Wednesday, and Friday x minutes/day = x/60 hrs/day
So in this total 3 days the total hours will be accumulated to = 3x/60 = x/20 hrs

Saturday, Sunday, Tuesday, Thursday y minutes/day = y/60 hrs/day
So in this total 4 days the total hours will be accumulated to = 4y/60 = 2y/30 hrs

Thus in a week total Mary works = x/20 + 2y/30 hrs

So total work in 20 weeks = 20*( x/20 + 2y/30 ) hrs = x + 4y/3 hrs

Average per day = (x + 4y/3)/(20*7) = (x + 4y/3)/140 = (3x+4y)/420
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by Anurag@Gurome » Tue Dec 28, 2010 8:54 am
mariah wrote:for 20 weeks, Mary works x minutes on Monday Wed. Fri. And y minutes on other weekdays. asked average working Hour per day ?
Note that the average over 20 weeks will be same as that of one week as she does same amount of work in each week.

In one week, i.e. 7 days she works for a total of (3x + 4y) minutes.
=> In 1 day she works for (3x + 4y)/7 minutes

Now (3x + 4y)/7 minutes = [(3x + 4y)/7]/60 hours = (3x + 4y)/420 hours
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by okletsdothis » Wed Dec 29, 2010 2:42 am
i think the term 'weekdays' is rather ambiguous. other week days could also mean tuesday and thursday only. since there might be no work on weekends which is normal incase of working professionals.
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by Tani » Wed Dec 29, 2010 9:09 am
Agree - I would automatically assume weekdays excluded Saturday and Sunday.
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by mariah » Wed Dec 29, 2010 4:23 pm
week days - mon. through Sunday
workweek days, working days , etc - mond . trough friday
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by Tani » Wed Dec 29, 2010 7:39 pm
not where I come from. Sometimes you see "business days" which means Monday to Friday but also excludes any holidays.
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