Question

Quantos anagramas da palavra VASSOURA, começam com a letra A?

Answer 1

$\sf{\underbrace{\boxed{A}VSSOURA}_{P_7^2}=\dfrac{7!}{2!}}\\\sf{\dfrac{7\cdot6\cdot5\cdot4\cdot3\cdot\diagdown\!\!\!\!2!}{\diagdown\!\!\!\!2!}=2520~anagramas}$