Solve the Problem$$\text { If } n ( B ) = 24 , n ( A \cap B ) = 5 \text {, and } n ( A \cup B ) = 42 \text {, find } n ( A ) \text {. }$$

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The Answer of Solve the Problem$$\text { If } n ( B ) = 24 , n ( A \cap B ) = 5 \text {, and } n ( A \cup B ) = 42 \text {, find } n ( A ) \text {. }$$

Solve the Problem $\text { If } n ( B ) = 24 , n ( A \cap B ) = 5 \text {, and } n ( A \cup B ) = 42 \text {, find } n ( A ) \text {. }$

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Solve the Problem If n(B)=24,n(A∩B)=5, and n(A∪B)=42, find n(A). \text { If } n ( B ) = 24 , n ( A \cap B ) = 5 \text {, and } n ( A \cup B ) = 42 \text {, find } n ( A ) \text {. } If n(B)=24,n(A∩B)=5, and n(A∪B)=42, find n(A).

Definitions:

Solve the Problem $\text { If } n ( B ) = 24 , n ( A \cap B ) = 5 \text {, and } n ( A \cup B ) = 42 \text {, find } n ( A ) \text {. }$