doubt gmatprep

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doubt gmatprep

by garima99 » Sat Oct 15, 2011 9:16 am
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by shankar.ashwin » Sat Oct 15, 2011 9:21 am
Given T/S = 3/80

Now we got to find S, when T = 5.

Corresponding S = (80/3)*5 = 133.3

S cannot be a decimal, hence D

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by sl750 » Sat Oct 15, 2011 9:28 am
shankar.ashwin wrote:Given T/S = 3/80

Now we got to find S, when T = 5.

Corresponding S = (80/3)*5 = 133.3

S cannot be a decimal, hence D
The question says T/S > 3/80, and not T/S=3/80; S<133

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by shankar.ashwin » Sat Oct 15, 2011 9:36 am
sl750 wrote: The question says T/S > 3/80, and not T/S=3/80; S<133
Technically we have 5/x > 3/80
or 400 >3S and S<133.33, which is 133.

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by abhi0697 » Sat Oct 15, 2011 9:38 am
garima99 wrote:attached
Kindly check out the below link for video solution:

https://www.youtube.com/watch?v=7tSwzFL1jkA

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by GMATGuruNY » Sat Oct 15, 2011 1:43 pm
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by HeyArnold » Sun Oct 16, 2011 6:54 am
What's the doubt?

if the ratio must be larger than 3 / 80

And there are 5 TA's, then first:

3 / 80 = 5 / x

x = 400/3 = 133.3

So the ratio must be larger than 5 / 133.3

You can't have 0.3 students, so you can have 133 students and still have a larger ratio than 5 / 133.3