Question

1-indique quantos são os anagramas da palavra REPÚBLICA que começam com R e terminem com A.
A)40.320 anagramas
B) 362.anagramas
C)3.628.800 anagramas
D)5.040 anagramas
E)720 anagramas

Me ajudem!!

Answer 1

$\boxed{\begin{array}{l}\sf\underbrace{\sf \boxed{\sf R}EP\acute UBLIC\boxed{\sf A}}_{P_7}=7!\\\sf P_7=7\cdot6\cdot5\cdot4\cdot3\cdot2\cdot1\\\sf P_7=5040~anagramas\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~D}}}}\end{array}}$