Find the Cardinal Number of the Indicated Set $n ( B ) = 60 , n ( A \cap B ) = 11$

Multiple Choice

Find the cardinal number of the indicated set. Use the cardinal number formula.
-If $n ( B ) = 60 , n ( A \cap B ) = 11$ , and $n ( A \cup B ) = 105$ , find $n ( A )$ .

A) 54
B) 56
C) 45
D) 58