Which of the Following Statements Is Always Correct?
A)P(A $\bar { A }$

Multiple Choice

Which of the following statements is always correct?

A) P(A ? B) = P(A) ? P(B) .
B) P(A ? B) = P(A) + P(B) .
C) P(A ? B) = P(A) + P(B) + P(A ? B) .
D) P(A) = 1 - P( $\bar { A }$ ) .