$A, B, C$ are three sets such that$n\left(A\right) = 25,$
$n\left(B\right)=20,n\left(c\right)=27,n(A\cap B)=5,n(B\cap C)=7$ and $A\cap C=\varnothing$ then $n(A\cup B\cup C)$ is equal to

• A

  60

• B

  65

• C

  67

• D

  72