Question

3) Calcule o número de anagramas
que podem ser formados com as
letras abaixo:
MBAOBSE

Answer 1

$\Large\boxed{\begin{array}{l}\sf \underbrace{\sf MBAOBSE}_{\sf 7~letras~repetindo~2}\\\\\sf P_7^2=\dfrac{7!}{2!}=\dfrac{7\cdot6\cdot5\cdot4\cdot3\cdot\diagdown\!\!\!\!\!\!2!}{\diagdown\!\!\!\!\!\!2!}\\\\\sf P_7^2=2520~anagramas\end{array}}$