Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 27 Mar 2015, 21:22

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Of the 300 patients who suffered from at least one symptom

Author Message
TAGS:
Director
Joined: 27 Jun 2005
Posts: 515
Location: MS
Followers: 2

Kudos [?]: 26 [0], given: 0

Of the 300 patients who suffered from at least one symptom [#permalink]  18 Feb 2006, 16:27
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Of the 300 patients who suffered from at least one symptom of A, B, and C, 35 % suffered from A, 45% suffered from B, 40 % suffered from C, 10% suffered from exactly 2 of them. How many people suffered from exactly one symptom?

also pls explain what is the best approach for these type of questions....
Intern
Joined: 16 Aug 2005
Posts: 37
Followers: 0

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

is it 255 ?

A, B, C=Number of patients who suffered from at least A, B, C
X=Number of patients who suffered from exactly 2 syptoms
Y=Number of patients who suffered from exactly 3 syptoms

Total number of patients=A+B+C-X-2Y
300=300(0.35+0.40+0.35-0.1)-2Y
300=330-2Y
Y=15

Number of patients who suffered from 1 symptom:
=A+B+C-2X-3Y
=300-45
=255
Similar topics Replies Last post
Similar
Topics:
Physician: The patient is suffering either from disease X or 5 15 Nov 2006, 02:18
Physician: The patient is suffering either from disease X or 2 13 Oct 2005, 17:35
7 Of the 300 patients who suffered from at least one symptom 23 17 May 2005, 07:20
1 Physician: The patient is suffering either from disease X or 15 10 May 2005, 14:47
Physician: The patient is suffering either from disease X or 8 23 Apr 2005, 18:59
Display posts from previous: Sort by