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OpenStudy (anonymous):
Find the number of permutations in the word arithmetic. Isn't it supposed to be n!/r! (since i repeats)? So 1814400?
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OpenStudy (anonymous):
\[\frac{ 10! }{ 2!2! }\] cause the i AND t are repeated
OpenStudy (raden):
i = twice t = twice
OpenStudy (anonymous):
boy I'm so observant. Thanks!
OpenStudy (anonymous):
no problem :)
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