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Last year, a certain public transportation system sold an

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Last year, a certain public transportation system sold an [#permalink] New post 15 Apr 2008, 17:42
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Last year, a certain public transportation system sold an average (arithmetic mean) of 41,000 tickets per day on weekdays (Monday through Friday) and an average of 18,000 tickets per day on Saturday and Sunday. Which of the following is closest to the total number of tickets sold last year?

1 mil
1.25 mil
10 mil
12.5 mil
125 mil
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Re: GMATPrep PS: Can you solve this via appox quickly? [#permalink] New post 15 Apr 2008, 18:26
With the answer choices provided, I would say it is safe to approximate in this manner...

41,000 x 5 + 18,000 x 2 = 241,000 (approx to 240,000)

52 weeks in a year (approx to 50)

Now, since 50 is much like .50 we have 12,000,000

Knowing that we lessened both values in our approximation, 12.5 million is apparent.

Hope this helps!
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Re: GMATPrep PS: Can you solve this via appox quickly? [#permalink] New post 16 Apr 2008, 02:17
I guess 10 mil is the corest answer:

(2/7)*365*18,000+(5/7)*365*41,000=10,6 mil
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Re: GMATPrep PS: Can you solve this via appox quickly? [#permalink] New post 16 Apr 2008, 04:01
Brindusa wrote:
I guess 10 mil is the corest answer:

(2/7)*365*18,000+(5/7)*365*41,000=10,6 mil


If you type that into the calculator, it results in 12.6 mil

[D], 12.5 mil, is the correct answer... see 2 posts above for quick approx method
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Re: GMATPrep PS: Can you solve this via appox quickly?   [#permalink] 16 Apr 2008, 04:01
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