izmirksk
22.06.2007, 23:21
Suppose you have three cards:
white on both sides
black on both sides
black and white sides
You put these into a hat. You draw out one card and place it (without looking at the reverse side) on the table. It is black on top. What is the probability that the other side is also black?
white on both sides
black on both sides
black and white sides
You put these into a hat. You draw out one card and place it (without looking at the reverse side) on the table. It is black on top. What is the probability that the other side is also black?