Q12Multiple choice
One urn contains two black balls (labelled B1 and B2) and one white ball. A second urn contains one black ball and two white balls (labelled W1 and W2). Suppose the following experiment is performed. One of the two urns is chosen at random. Next a ball is randomly chosen from the urn. Then a second ball is chosen at random from the same urn without replacing the first ball.
- (a)Write the sample space showing all possible outcomes
- (b)What is the probability that two black balls are chosen?
- (c)What is the probability that two balls of opposite colour are chosen?