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10 Oct 2006, 00:00
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A code is made from a sequence of 4 letters.
How many different codes could be made using the letters from the word area?
How many different codes could be made using the letters from the word area?
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10 Oct 2006, 00:34
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12?
recently i started using the new approach to these kind of problems... trying to get used to it....
AreA....
4!/2!=12
The key here is to see how many same letters the word has....
For example for word "SmIlIeS" you can have: 7!/(2!*2!)=1260 different codes....
recently i started using the new approach to these kind of problems... trying to get used to it....
AreA....
4!/2!=12
The key here is to see how many same letters the word has....
For example for word "SmIlIeS" you can have: 7!/(2!*2!)=1260 different codes....
10 Oct 2006, 12:38
Kudos
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A code is made from a sequence of 4 letters.
How many different codes could be made using the letters from the word area?
Not that combos and perms are my strengths but is this really a combo? I reckon it is a permutation problem
answer is 4! = 24?
How many different codes could be made using the letters from the word area?
Not that combos and perms are my strengths but is this really a combo? I reckon it is a permutation problem
answer is 4! = 24?
