At a business school conference with 100 attendees, are there any students of the same age(rounded to the nearest year) who attend the same school?
(1)The range of ages of the participants is 22 to 30, inclusive
(2)Participants represent 10 business schools
Business School Problem
This topic has expert replies
- cans
- Legendary Member
- Posts: 1309
- Joined: Mon Apr 04, 2011 5:34 am
- Location: India
- Thanked: 310 times
- Followed by:123 members
- GMAT Score:750
100 attendees.
A) Maybe attendees are all from different schools. or maybe same Insufficient
B) on average, 10 attendees per school. there age can be 21,22...30 or 21,21,...21
Insufficient
A&B) range=22 to 30: 22,23...30 (total 9 ages..)
also 10 business schools. therefore atleast one school will have more than 9 attendees. otherwise total will be only 90 max. Let that school be A.
Now A has 10 students and we have only 9 different ages. Thus atleast 2 students will have same age. Sufficient
IMO C
A) Maybe attendees are all from different schools. or maybe same Insufficient
B) on average, 10 attendees per school. there age can be 21,22...30 or 21,21,...21
Insufficient
A&B) range=22 to 30: 22,23...30 (total 9 ages..)
also 10 business schools. therefore atleast one school will have more than 9 attendees. otherwise total will be only 90 max. Let that school be A.
Now A has 10 students and we have only 9 different ages. Thus atleast 2 students will have same age. Sufficient
IMO C
If my post helped you- let me know by pushing the thanks button
Contact me about long distance tutoring!
[email protected]
Cans!!
Contact me about long distance tutoring!
[email protected]
Cans!!