SOLUTION: how many ways 4 letter combinations can be formed out of the letters of the word LOGARITHMS if repetition of letters is not allowed

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Question 1105380: how many ways 4 letter combinations can be formed out of the letters of the word LOGARITHMS if repetition of letters is not allowed
Answer by rothauserc(4718) About Me  (Show Source):
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LOGARITHMS has 10 distinct letters
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If ordering of letters is important, for example
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LOGA is different from OLGA
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10P4 = 10 * 9 * 8 * 7 = 5040 ways
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If ordering of letters is not important, for example
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LOGA is the same as OLGA
:
10C4 = 10! / (4! * (10-4)!) = 210 ways
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