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Difficult Math Problem #71 - Combinations

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800guy Master | Next Rank: 500 Posts Default Avatar
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Difficult Math Problem #71 - Combinations

Post Mon Dec 04, 2006 2:44 pm
In how many ways can 5 rings be worn on the four fingers of the right hand?

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aim-wsc Legendary Member
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Post Sun Dec 17, 2006 8:09 pm
4 to the power of 5

answer: 4^5

I want you to provide the explanation to the answer if you have.
you know i suck at giving proper explanantion.

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800guy Master | Next Rank: 500 Posts Default Avatar
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Post Tue Jan 02, 2007 9:45 am
OA:

5 rings, 4 fingers
1st ring can be worn on any of the 4 fingers => 4 possibilities
2nd ring can be worn on any of the 4 fingers => 4 possibilities
3rd ring can be worn on any of the 4 fingers => 4 possibilities
4th ring can be worn on any of the 4 fingers => 4 possibilities
5th ring can be worn on any of the 4 fingers => 4 possibilities

Total possibilities = 4*4*4*4*4 = 4^5.

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