- #1
TheSodesa
- 224
- 7
Homework Statement
[/B]
[tex]P(A | \overline{B}) = ?[/tex]
Homework Equations
Multiplicative rule:
\begin{equation}
P(A | B) = \frac{P(A \cap B)}{P(B)}
\end{equation}
Additive rule:
\begin{equation}
P(A \cup B) = P(A) + P(B) - P(A \cap B)
\end{equation}
Difference:
\begin{equation}
A \backslash B = A \cap \overline{B}
\end{equation}
A hint:
\begin{equation}
P(\overline{A} \backslash B) = P(\overline{A} \cap \overline{B})
\end{equation}
The Attempt at a Solution
Using equation (1):
[tex]P(A | \overline{B}) = \frac{P(A \cap \overline{B})}{P(\overline{B})}[/tex]
This is where I'm stuck. I don't see how ##(3)## nor ##(4)## would help me here, since there is not an identity I could use to convert a difference into something more operable.
What to do?