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this one was classified as a hard problem in the book

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VP
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this one was classified as a hard problem in the book [#permalink] New post 16 Sep 2007, 08:03
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Please post the time it takes u to solve the problem. This problem is classified as a hard one. How would you rate?
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toyotas and fords.JPG
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Joined: 28 Dec 2004
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Schools: Wharton'11 HBS'12
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 [#permalink] New post 16 Sep 2007, 08:18
I get 12...

T + F=16+11 - 15 - (who on 2 cars)=0

who on 2 cars =12

I dont think we can

F+T-Single car owner -2(two car owner)
Director
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Re: this one was classified as a hard problem in the book [#permalink] New post 16 Sep 2007, 08:20
Ravshonbek wrote:
Please post the time it takes u to solve the problem. This problem is classified as a hard one. How would you rate?



Let it be x ( both cars )
People having only F = 16-x and only T = 11 - x
By ques, 16-x + 11 - x = 15 => x = 6 which is asked.
Director
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Re: this one was classified as a hard problem in the book [#permalink] New post 16 Sep 2007, 09:27
Ravshonbek wrote:
Please post the time it takes u to solve the problem. This problem is classified as a hard one. How would you rate?


i get B 6.. took me less than 60 sec
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 [#permalink] New post 16 Sep 2007, 22:23
if # of people who own both is x,

then 16-x + 11-x = 15
-2x = -12
x = 6.

less than 40 seconds. i rate this extremely easy.
VP
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 [#permalink] New post 16 Sep 2007, 22:46
Ford = (5+6) = 11
Toyota = (10+6) = 16

Only one type = 5+10 = 15

so the answer should be (B)

since the six people in each group are the same people !

:)
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Re: this one was classified as a hard problem in the book [#permalink] New post 17 Sep 2007, 13:50
beckee529 wrote:
Ravshonbek wrote:
Please post the time it takes u to solve the problem. This problem is classified as a hard one. How would you rate?


i get B 6.. took me less than 60 sec


6. Took 35.85 seconds.
made a venn diagram,

16-x+11-x=15
VP
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Re: this one was classified as a hard problem in the book [#permalink] New post 17 Sep 2007, 17:44
Ravshonbek wrote:
Please post the time it takes u to solve the problem. This problem is classified as a hard one. How would you rate?


B.

16-x+11-x = 15
x=6
Director
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 [#permalink] New post 17 Sep 2007, 18:34
x = both cars

16 - x

11 - x

how can we be so confident that x is less than 11 and 16?
Manager
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 [#permalink] New post 17 Sep 2007, 19:58
this has to be an easy one, however, if you say its tough.. it definetley makes me happy to have solved in 1 mins

answer 6
  [#permalink] 17 Sep 2007, 19:58
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