|
Author |
Message |
|
TAGS:
|
|
|
Intern
Joined: 24 Nov 2012
Posts: 12
Followers: 0
Kudos [?]:
0
[0], given: 0
|
When Professor Wang looked at the rosters for this term's [#permalink]
 27 Nov 2012, 01:20
Question Stats:
100% (02:28) correct
0% (00:00) wrong based on 1 sessions
When Professor Wang looked at the rosters for this term's classes, she saw that the roster for her economics class (E) had 26 names, the roster for her marketing class (M) had 28, and the roster for her statistics class (S) had 18. When she compared the rosters, she saw that E and M had 9 names in common, E and S had 7, and M and S had 10. She also saw that 4 names were on all 3 rosters. If the rosters for Professor Wang's 3 classes are combined with no student's name listed more than once, how many names will be on the combined roster?
A. 30
B. 34
C. 42
D. 46
E. 50
Last edited by Bunuel on 27 Nov 2012, 03:22, edited 1 time in total.
Renamed the topic and edited the tags.
|
|
|
|
|
|
|
GMAT Club team member
Joined: 02 Sep 2009
Posts: 11534
Followers: 1795
Kudos [?]:
9560
[0], given: 826
|
Re: When Professor Wang looked at the rosters for this term's [#permalink]
27 Nov 2012, 03:48
saxenarahul021 wrote: When Professor Wang looked at the rosters for this term's classes, she saw that the roster for her economics class (E) had 26 names, the roster for her marketing class (M) had 28, and the roster for her statistics class (S) had 18. When she compared the rosters, she saw that E and M had 9 names in common, E and S had 7, and M and S had 10. She also saw that 4 names were on all 3 rosters. If the rosters for Professor Wang's 3 classes are combined with no student's name listed more than once, how many names will be on the combined roster?
A. 30
B. 34
C. 42
D. 46
E. 50 Total # of students 26+28+18-(9+7+10)+4=50. Answer: E. For more check ADVANCED OVERLAPPING SETS PROBLEMS
_________________
PLEASE READ AND FOLLOW: 11 Rules for Posting!!!
RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory
COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!
DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!
What are GMAT Club Tests?
25 extra-hard Quant Tests
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
|
Re: When Professor Wang looked at the rosters for this term's
[#permalink]
27 Nov 2012, 03:48
|
|
|
|
|
|
|
|
|
|
|
close
