It is currently 21 Sep 2017, 03:50

### 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

# You have a group of 10 teachers, 4 teach French and 6 teach

Author Message
Intern
Joined: 28 May 2003
Posts: 13

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

You have a group of 10 teachers, 4 teach French and 6 teach [#permalink]

### Show Tags

10 Aug 2004, 08:08
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

You have a group of 10 teachers, 4 teach French and 6 teach Spanish or German. How many groups of three can you make that contain at least 1 French teach?

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

GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4285

Kudos [?]: 523 [0], given: 0

### Show Tags

10 Aug 2004, 08:14
100
# of ways to form a group of 3 out of 10: 10C3 = 120
unfavorable outcomes where there are no french teachers: 6C3 = 20
Favorable outcomes: 120-20 = 100
_________________

Best Regards,

Paul

Kudos [?]: 523 [0], given: 0

Senior Manager
Joined: 05 Feb 2004
Posts: 290

Kudos [?]: 5 [0], given: 0

Location: USA

### Show Tags

10 Aug 2004, 08:18
Agree 100..
Group of 3 = Prob of 1 french + Prob of 2 French + Prob all 3 are french
=4C1*6C2 + 4C2*6C1 + 4C3
= 100..

Kudos [?]: 5 [0], given: 0

CIO
Joined: 09 Mar 2003
Posts: 463

Kudos [?]: 68 [0], given: 0

### Show Tags

10 Aug 2004, 08:53
agree with 100 and with method.

Kudos [?]: 68 [0], given: 0

Manager
Joined: 28 Jul 2004
Posts: 179

Kudos [?]: 18 [0], given: 0

### Show Tags

10 Aug 2004, 10:24
4C1 * 6C2 + 4C2 * 6C1 + 4C3 = 100

Thanks

Kudos [?]: 18 [0], given: 0

10 Aug 2004, 10:24
Display posts from previous: Sort by