Question

find P(A|A^c)

Answer 1

A. 1
B. 0
C. 1/2
D. unknown

Answer 2

By definition,
\( P(A|B) = P(A\cup B)/P(B)\)
Try to substitute \( B=A\cap C) \) into the above definition and see what you get.

Answer 3

i dont comprehend..

Answer 4

Sorry that there was a typo. The definition should have read:
\( P(A|B)=P(A\cap B)/P(B) \)
This is the definition of conditional probability using set notation.
\( \cap \) denotes intersection, and
\( \cup \) denotes union.
A and B are events represented by sets.