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Last year in a group of 30 businesses, 21 reported a net

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Last year in a group of 30 businesses, 21 reported a net [#permalink] New post 01 Jun 2009, 18:23
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Last year in a group of 30 businesses, 21 reported a net profit and
15 had investments in foreign markets. How many of the businesses
did not report a net profit nor invest in foreign markets last year?
(1) last year 12 of the 30 businesses
reported a net profit and had investments
in foreign markets.
(2) last year 24 of the 30 businesses
reported a net profit or invested in
foreign markets, or both.

Want to make sure that Oa is wrong!
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Joined: 08 Feb 2009
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Re: Sets [#permalink] New post 01 Jun 2009, 18:38
Answer - D

Total = N = Profit + Not Profit = Invest + Not Invest

If you draw out a chart, it is easier.

(1) 30 = 21 + 9 = 15 + 15

If 12 reported Profit and Invested, 15-12 = 3 Invested, but Not Profit.
Not Profit = 9.
Not Profit - Invest, Not Profit = 9 - 3 = 6.
SUFFICIENT.

(2)
This is straightforward.
30 - 24 = 6
SUFFICIENT.
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Re: Sets [#permalink] New post 01 Jun 2009, 21:00
sondenso wrote:
Last year in a group of 30 businesses, 21 reported a net profit and
15 had investments in foreign markets. How many of the businesses
did not report a net profit nor invest in foreign markets last year?
(1) last year 12 of the 30 businesses
reported a net profit and had investments
in foreign markets.
(2) last year 24 of the 30 businesses
reported a net profit or invested in
foreign markets, or both.

Want to make sure that Oa is wrong!


Variables:
P - net profit
F - foreign markets
B - both
X - neither

Given:
P+B+F+X=30

P+B=21

F+B=15

Question:(X?)

(1) B=12

(2) P+F+B=24

We're given 3 equations, we just need 1 more. Either fact gives us this.

Final Answer, D.
_________________

Hades

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SVP
avatar
Joined: 04 May 2006
Posts: 1941
Schools: CBS, Kellogg
Followers: 18

Kudos [?]: 323 [0], given: 1

Premium Member
Re: Sets [#permalink] New post 02 Jun 2009, 00:34
Hades wrote:
sondenso wrote:
Last year in a group of 30 businesses, 21 reported a net profit and
15 had investments in foreign markets. How many of the businesses
did not report a net profit nor invest in foreign markets last year?
(1) last year 12 of the 30 businesses
reported a net profit and had investments
in foreign markets.
(2) last year 24 of the 30 businesses
reported a net profit or invested in
foreign markets, or both.

Want to make sure that Oa is wrong!


Variables:
P - net profit
F - foreign markets
B - both
X - neither

Given:
P+B+F+X=30

P+B=21

F+B=15

Question:(X?)

(1) B=12

(2) P+F+B=24

We're given 3 equations, we just need 1 more. Either fact gives us this.

Final Answer, D.


Agree, D should be the OA
OA wrong!
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Manager
Manager
User avatar
Joined: 13 May 2009
Posts: 195
Schools: Stanford, Harvard, Berkeley, INSEAD
Followers: 5

Kudos [?]: 28 [0], given: 1

Re: Sets [#permalink] New post 02 Jun 2009, 00:54
sondenso wrote:
Hades wrote:
sondenso wrote:
Last year in a group of 30 businesses, 21 reported a net profit and
15 had investments in foreign markets. How many of the businesses
did not report a net profit nor invest in foreign markets last year?
(1) last year 12 of the 30 businesses
reported a net profit and had investments
in foreign markets.
(2) last year 24 of the 30 businesses
reported a net profit or invested in
foreign markets, or both.

Want to make sure that Oa is wrong!


Variables:
P - net profit
F - foreign markets
B - both
X - neither

Given:
P+B+F+X=30

P+B=21

F+B=15

Question:(X?)

(1) B=12

(2) P+F+B=24

We're given 3 equations, we just need 1 more. Either fact gives us this.

Final Answer, D.


Agree, D should be the OA
OA wrong!


Where are you getting these from?
_________________

Hades

Re: Sets   [#permalink] 02 Jun 2009, 00:54
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