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A poll with N people were interviewed. If 1/4 of them

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Director
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A poll with N people were interviewed. If 1/4 of them [#permalink] New post 04 Jul 2005, 08:18
A poll with N people were interviewed. If 1/4 of them answered "YES" to Q1 and of those 1/3 answered "YES" to Q2 in terms of N what is the number of people who were interviewed who did not answer "YES" to both the questions.

P.N.

My analysis is whether its 1/3 of N/4 OR is it N/ 3 istself in either way i cannot seem get the ans.
Director
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 [#permalink] New post 04 Jul 2005, 09:22
I got 5/3N

1/4N ans yes to Q1, thus 3/4N ans no to Q1

1/3(1/4N) ans yes to Q1, thus 11/12N ans no to Q2

3/4N + 11/12N = 5/3N
VP
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Re: Word Problem on counting [#permalink] New post 04 Jul 2005, 12:31
rxs0005 wrote:
A poll with N people were interviewed. If 1/4 of them answered "YES" to Q1 and of those 1/3 answered "YES" to Q2 in terms of N what is the number of people who were interviewed who did not answer "YES" to both the questions.

P.N.

My analysis is whether its 1/3 of N/4 OR is it N/ 3 istself in either way i cannot seem get the ans.


1/12(N) answer Q1 as well as Q2. 1-1/12=number of ppl who answer Q1 or Q2.
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Director
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 [#permalink] New post 04 Jul 2005, 13:02
the OA is 11N/12

Can either of you explain how its got I still dont get it

I know the indivdual total for every Q has to be N in essence there are 2N replies totally.
VP
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 [#permalink] New post 04 Jul 2005, 13:26
rxs0005 wrote:
the OA is 11N/12

Can either of you explain how its got I still dont get it

I know the indivdual total for every Q has to be N in essence there are 2N replies totally.


1/3*1/4=1/12. so 1/12 answer "yes" to both questions and 11/12 do not answer "yes" to both questions. draw a venn diagram. the intersection contains 1/12.
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Senior Manager
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 [#permalink] New post 04 Jul 2005, 19:02
rxs0005 wrote:
the OA is 11N/12

Can either of you explain how its got I still dont get it

I know the indivdual total for every Q has to be N in essence there are 2N replies totally.


3N/4 could not say YES to Q1.
Of the remaining N/4 , 2/3*N/4 could not say YES for Q2.(typo Q1 earlier)

Hence the total would could not say YES to either Q1 or Q2 is
3N/4 + N/6 = 11N/12.

HMTG.
  [#permalink] 04 Jul 2005, 19:02
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A poll with N people were interviewed. If 1/4 of them

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