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

 It is currently 03 May 2015, 15:16

### 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

# From a set of 6 questions, in how many ways can a student

Author Message
TAGS:
SVP
Joined: 29 Aug 2007
Posts: 2497
Followers: 57

Kudos [?]: 556 [0], given: 19

From a set of 6 questions, in how many ways can a student [#permalink]  24 Oct 2007, 20:53
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
From a set of 6 questions, in how many ways can a student solve 1 or more than 1 questions?

a. 6
b. 12
c. 63
d. 64
e. 65
VP
Joined: 08 Jun 2005
Posts: 1147
Followers: 6

Kudos [?]: 128 [0], given: 0

total ways = 6C1+6C2+6C3+6C4+6C5+6C6 = 6+15+20+15+6+1= 63

SVP
Joined: 29 Aug 2007
Posts: 2497
Followers: 57

Kudos [?]: 556 [0], given: 19

KillerSquirrel wrote:
total ways = 6C1+6C2+6C3+6C4+6C5+6C6 = 6+15+20+15+6+1= 63

can you tell, in how many way can these questions be solved in total?
VP
Joined: 08 Jun 2005
Posts: 1147
Followers: 6

Kudos [?]: 128 [0], given: 0

GMAT TIGER wrote:
KillerSquirrel wrote:
total ways = 6C1+6C2+6C3+6C4+6C5+6C6 = 6+15+20+15+6+1= 63

can you tell, in how many way can these questions be solved in total?

64 ways

you need to add 6C0 = 6!/6! = 1 ---> solving none

Director
Joined: 11 Jun 2007
Posts: 932
Followers: 1

Kudos [?]: 70 [0], given: 0

KillerSquirrel wrote:
total ways = 6C1+6C2+6C3+6C4+6C5+6C6 = 6+15+20+15+6+1= 63

nice work KS.. but seems too time consuming!
SVP
Joined: 29 Aug 2007
Posts: 2497
Followers: 57

Kudos [?]: 556 [0], given: 19

KillerSquirrel wrote:
GMAT TIGER wrote:
KillerSquirrel wrote:
total ways = 6C1+6C2+6C3+6C4+6C5+6C6 = 6+15+20+15+6+1= 63

can you tell, in how many way can these questions be solved in total?

64 ways

you need to add 6C0 = 6!/6! = 1 ---> solving none

thanks. i was looking for a direct way to find the total.

for ex: what is the prob of getting 2 boys and 3 girls from 5 boys and 6 girls?

2 boys = 5c2 = 10
3 girls = 6c3 = 20
2 boys x 3 girls = 10x20 = =200

prob = 200/11c5 = 200/462

i am looking for a way to find 11c5 = 11!/{(5!)(11-5)1}
Similar topics Replies Last post
Similar
Topics:
4 How many ways can you group 3 people from 4 sets of twins if no two 3 05 Oct 2014, 00:00
1 In how many ways can one choose 6 cards from a normal deck 9 23 Oct 2009, 17:07
In how many ways can one choose 6 cards from a normal deck 2 17 Aug 2008, 01:49
In how many ways can one choose 6 cards from a normal deck 20 11 Aug 2007, 06:13
In how many ways can one choose 6 cards from a normal deck 7 02 Jul 2007, 22:24
Display posts from previous: Sort by