PaulCarlock
New member
- Joined
- Jan 15, 2018
- Messages
- 1
[FONT="][FONT="]An urn contains W white marbles and B black marbles. Two marbles are randomly and simultaneously drawn from the urn. (The two marbles might both be black, or might both be white, or might be of different colors.) If the probability that the marbles have the same color is 0.5 (i.e. both are white or both are black), then W and B must be ??????????? ?????????? numbers. (The first word has 11 letters, the second word has 10.)[/FONT][/FONT]