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# COMBINATIONS

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Manager
Joined: 04 Sep 2006
Posts: 113

Kudos [?]: 66 [0], given: 0

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02 Feb 2009, 10:36
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q; IN HOW MANY WAYS CAN 8 DIFFERENT BOOKS BE EVENLY DISTRIBUTED BY FOUR PERSONS?

630 840 1260 1830 2520

Kudos [?]: 66 [0], given: 0

SVP
Joined: 07 Nov 2007
Posts: 1790

Kudos [?]: 1105 [1], given: 5

Location: New York

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02 Feb 2009, 11:03
1
KUDOS
vcbabu wrote:
q; IN HOW MANY WAYS CAN 8 DIFFERENT BOOKS BE EVENLY DISTRIBUTED BY FOUR PERSONS?

630 840 1260 1830 2520

Its same as 4 people selecting 2 books each.

= 8C2*6C2*4C2*2C2 = 1260
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Smiling wins more friends than frowning

Kudos [?]: 1105 [1], given: 5

SVP
Joined: 29 Aug 2007
Posts: 2469

Kudos [?]: 868 [0], given: 19

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02 Feb 2009, 11:36
x2suresh wrote:
vcbabu wrote:
q; IN HOW MANY WAYS CAN 8 DIFFERENT BOOKS BE EVENLY DISTRIBUTED BY FOUR PERSONS?

630 840 1260 1830 2520

Its same as 4 people selecting 2 books each.

= 8C2*6C2*4C2*2C2 = 1260

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Kudos [?]: 868 [0], given: 19

SVP
Joined: 07 Nov 2007
Posts: 1790

Kudos [?]: 1105 [0], given: 5

Location: New York

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03 Feb 2009, 15:59
vcbabu wrote:

Its same as 4 people selecting 2 books each.

= 8C2*6C2*4C2*2C2 = 1260

You have 8 books and 4 people

= (fist person select 2 out of 8 books) *(second person select 2 out of 6 books) *(third person select 2 out of 4 books) *(fourth person select 2 out of 2 books) *
= 8C2*6C2*4C2*2C2 = 1260
_________________

Smiling wins more friends than frowning

Kudos [?]: 1105 [0], given: 5

Intern
Joined: 31 Jan 2009
Posts: 10

Kudos [?]: 4 [0], given: 0

Schools: UTA, Fuqua, UNC, Yale, Colombia

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04 Feb 2009, 16:40
Sorry but what is C2 in this problem? Not sure how you came up to 1260.

Kudos [?]: 4 [0], given: 0

Director
Joined: 29 Aug 2005
Posts: 855

Kudos [?]: 518 [0], given: 7

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05 Feb 2009, 00:36
x2suresh wrote:
vcbabu wrote:

Its same as 4 people selecting 2 books each.

= 8C2*6C2*4C2*2C2 = 1260

You have 8 books and 4 people

= (fist person select 2 out of 8 books) *(second person select 2 out of 6 books) *(third person select 2 out of 4 books) *(fourth person select 2 out of 2 books) *
= 8C2*6C2*4C2*2C2 = 1260

Does this not result in 2520?

Kudos [?]: 518 [0], given: 7

Manager
Joined: 13 Jan 2009
Posts: 170

Kudos [?]: 26 [0], given: 9

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05 Feb 2009, 04:26
Agree with 1260. What is the OA?

Kudos [?]: 26 [0], given: 9

Manager
Joined: 13 Jan 2009
Posts: 170

Kudos [?]: 26 [0], given: 9

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05 Feb 2009, 04:27
Agree with 1260. What is the OA?

Kudos [?]: 26 [0], given: 9

Manager
Joined: 01 May 2008
Posts: 110

Kudos [?]: 8 [0], given: 0

Location: São Paulo

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07 Feb 2009, 10:18
botirvoy wrote:
x2suresh wrote:
vcbabu wrote:

Its same as 4 people selecting 2 books each.

= 8C2*6C2*4C2*2C2 = 1260

You have 8 books and 4 people

= (fist person select 2 out of 8 books) *(second person select 2 out of 6 books) *(third person select 2 out of 4 books) *(fourth person select 2 out of 2 books) *
= 8C2*6C2*4C2*2C2 = 1260

Does this not result in 2520?

I agee. The result of that is 2520, not 1260.

Kudos [?]: 8 [0], given: 0

SVP
Joined: 07 Nov 2007
Posts: 1790

Kudos [?]: 1105 [0], given: 5

Location: New York

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07 Feb 2009, 12:06
Yeap!! it should be 2520
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Smiling wins more friends than frowning

Kudos [?]: 1105 [0], given: 5

Re: COMBINATIONS   [#permalink] 07 Feb 2009, 12:06
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# COMBINATIONS

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