1003024608 | math4u.vsb.cz

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How many ways are there to arrange the letters in the Czech word KOMBINATORIKA?

\frac{13!}{(2!)^{4}} = 389 188 800

\frac{13!}{4 \cdot 2!} = 778 377 600

\frac{13!}{2!} = 3 113 510 400

13! - 4 \cdot 2! = 6 227 020 792