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joemama142000
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A testing company surveyed 60 people who rank three 18 Jan 2006, 11:50
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A testing company surveyed 60 people who rank three diffrerent schools: Villanova, Columbia, and Stanford. All of the people ranked the schools and there is no situation in which two schools rank equally. 36 of the people ranked Villanova as the worst. 6 of the people ranked Villanova ahead of Columbia and 20 of the people ranked Villanova ahead of Stanford. how many people ranked Villanova first?



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allabout
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A testing company surveyed 60 people who rank three 18 Jan 2006, 12:13
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It's 2

We need the number of people who ranked Villanova infront of both Columbia and Stanford.

Total of 60 people

V is worse = 36

24 people left

(VC+VS) - (people left) =

6+20-24=2
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sperumba
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A testing company surveyed 60 people who rank three 18 Jan 2006, 12:25
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Great questions .

is the answer 6.
If it is I will explain.
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chiragr
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A testing company surveyed 60 people who rank three 18 Jan 2006, 14:30
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How to get 2?

Cound not follow allabout's explaination...
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ps_dahiya
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A testing company surveyed 60 people who rank three 18 Jan 2006, 17:00
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allabout
It's 2

We need the number of people who ranked Villanova infront of both Columbia and Stanford.

Total of 60 people

V is worse = 36

24 people left

(VC+VS) - (people left) =

6+20-24=2
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Could you please explain a bit more on this???
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Bhai
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A testing company surveyed 60 people who rank three 18 Jan 2006, 19:06
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I remember doing a different question just like this one. Same numbers but the schools were different.
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sperumba
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A testing company surveyed 60 people who rank three 18 Jan 2006, 19:26
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ps_dahiya,

i used a simple venn diagram to solve this question.

n(u) = 60 . - u is the universal set.
let C be columbia and s be stanford.
n(CUS) = 60 -36 = 24.

N(C) - number fo ppl who have voted V >C
n(S) - Number for ppl who voted V >S.

N(C INT S) - number for ppl who voted for V >C and S.

N (CUS) = n(C) + N(S) - n(C INT S)
=> 24 = 6 + 20 - X

Therefore x = 2.
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A testing company surveyed 60 people who rank three 18 Jan 2006, 21:20
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I,m not sure, but I appproached that like this:

Total=Worsrt+Second Worst (over Columbia)+Second Worst(Over Stanford)-Neither (Best)

60=36+20+6-Best
===>60=62-2
===>Best=2



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This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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Thank you for understanding, and happy exploring!
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