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Mathematics 10 Online
OpenStudy (anonymous):

how many different arrangements are there in the word CANADA

OpenStudy (wolf1728):

Combinations = 6! if no repetitions. CANADA has 3 repeated letters and we must divide 6! by 3! 6 * 5 * 4 * 3 * 2 / 3 * 2 = 5! = 120

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