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OpenStudy (anonymous):
How many different words of 4letters each can be fromed from the word "Chemistry" if each letter is used no more than one time? Hint: The words do not have to have a meaning
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OpenStudy (anonymous):
2?
OpenStudy (anonymous):
how so
OpenStudy (anonymous):
i thought it was four slots for the letters and there are 9 letters in total therefore the first slot has 9 possible letters, one letter fills that spot so the next has 8 possible letters and so on. So its 9x8x7x6 which is 3024 but i may be wrong, I'm trying to understand this right now myself. Does this approach make sense?
OpenStudy (anonymous):
Yes! :)
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