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At a certain university, the ratio of the number of teaching

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Manager
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At a certain university, the ratio of the number of teaching [#permalink]

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New post 30 May 2006, 17:12
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At a certain university, the ratio of the number of teaching assistants to the number of students in any course must always be greater than 3:80
At this university what is the maximum number of students possible in a course that has 5 teaching assistants

130
131
132
133
134
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Re: GMATPREP : Teaching assistants [#permalink]

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New post 30 May 2006, 17:55
dinesh8 wrote:
At a certain university, the ratio of the number of teaching assistants to the number of students in any course must always be greater than 3:80. At this university what is the maximum number of students possible in a course that has 5 teaching assistants

130
131
132
133
134


= (80/3)(5)
= 133.33

to have the the ratio always greater than 3:80, the max. no. of student is 133.
Senior Manager
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New post 30 May 2006, 19:51
Yep agree, 133 it is.
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New post 30 May 2006, 22:11
Ans - 133

There are five teaching assistants.
Now 5/x = 3/80
X(students) = 133.33

Now which is greater than 3/80 ..... 5/133 or 5/134

5/133 is greater than 3/80 not 5/134 hence maximum number of students = 133
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New post 18 Apr 2007, 15:04
jaynayak wrote:
Ans - 133

There are five teaching assistants.
Now 5/x = 3/80
X(students) = 133.33

Now which is greater than 3/80 ..... 5/133 or 5/134

5/133 is greater than 3/80 not 5/134 hence maximum number of students = 133


I don't understand why it can not be 5/134. Can anybody explain? :)
  [#permalink] 18 Apr 2007, 15:04
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At a certain university, the ratio of the number of teaching

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