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Difficult Math Question #25 - Sets

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800guy Master | Next Rank: 500 Posts Default Avatar
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Difficult Math Question #25 - Sets

Post Mon Oct 09, 2006 4:33 pm
OA after some people answer...

How many different subsets of the set {10,14,17,24} are there that contain an odd number of elements?

(a) 3 (b) 6 (c) 8 (d) 10 (e) 12

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anandsebastin Junior | Next Rank: 30 Posts Default Avatar
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Post Wed Oct 18, 2006 6:40 pm
C

subsets with one element - 4
subsets with 3 elements - {10,14,17}, {10, 17,24}, {10,14,24}, {14,17,24} = 4. Total = 8

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800guy Master | Next Rank: 500 Posts Default Avatar
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Post Thu Oct 12, 2006 10:08 am
here's the oa:

8 is the answer. The different subsets are

10,
14,
17,
24,
10, 14, 17

14 17 24

17 24 10

24 10 14

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anandsebastin Junior | Next Rank: 30 Posts Default Avatar
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Post Wed Oct 18, 2006 6:40 pm
C

subsets with one element - 4
subsets with 3 elements - {10,14,17}, {10, 17,24}, {10,14,24}, {14,17,24} = 4. Total = 8

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