Question

Find the number of distinguishable permutations of the letters in the word vaccination

Answer 1

$\frac{11 \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{(2 \times 1)(2 \times 1)(2 \times 1)(2 \times 1)}$
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