Question

Determine o número de anagramas formado pela palavra ARQUIBANCADA.​

Answer 1

$\mathsf{\underbrace{ARQUIBANCADA}_{P_{12}^~{4}}=\dfrac{12!}{4!}}\\\mathsf{\dfrac{12\cdot11\cdot10\cdot9\cdot8\cdot7\cdot6\cdot5\cdot \diagup\!\!\!\!4!}{\diagup\!\!\!\!4!}=19958400}$