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# From a set of six elements, how many different subsets can

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Manager
Joined: 24 Jun 2003
Posts: 91

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Location: Moscow
From a set of six elements, how many different subsets can [#permalink]

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08 Aug 2003, 01:09
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From a set of six elements, how many different subsets can be arranged consisting of
a) four elements each;
b) at least four elements each;
c) at most four elements each?

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

SVP
Joined: 03 Feb 2003
Posts: 1603

Kudos [?]: 303 [0], given: 0

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08 Aug 2003, 04:48
(a) 6C4
(b) 6C4+6C5+6C6
(c) 6C0+6C1+6C2+6C3+6C4

6C0=1 is a void set. Does it satisfy (c)?

Kudos [?]: 303 [0], given: 0

08 Aug 2003, 04:48
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# From a set of six elements, how many different subsets can

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