Note that Pr[A u B] = Pr[A] + Pr[B] - Pr[A n B].
I am in a finite mathematics class and have been given the following Pr[A|B] = 3/4 Pr[B|A] = 3/8 and Pr[A u B] = 1
I have been asked to find Pr[A] Pr[B] and Pr[A n B]
the book has provided the formula:
Pr[A|B] = Pr[A n B] Pr[B|A] = Pr[B n A]
Pr[B] Pr[A]
I am having difficulty understanding where to begin with this. Thanks.