youngbuddhist
New member
- Joined
- Mar 3, 2007
- Messages
- 3
An urn contains w white balls and b black balls. A ball is drawn at random from the urn and then replaced, along with d more balls of its color. Then a ball is drawn at random from the w+b+d balls that are now in the urn. Let B1 be the event that the first ball drawn is black, and let B2 be the event that the second ball drawn is black.
a) Find P(B1). Find P(B2).
b) Find P(B2 given B1). Find P(B1 given B2).
I am very confused as to how to solve this problem. Can someone clearly explain to me in detail how to solve for all the probabilities (and work them out)? Thanks.
a) Find P(B1). Find P(B2).
b) Find P(B2 given B1). Find P(B1 given B2).
I am very confused as to how to solve this problem. Can someone clearly explain to me in detail how to solve for all the probabilities (and work them out)? Thanks.