Probability Tree diagrams Example: A bag contains 10 discs: 7 are black and 3 white. A disc is selected and then replaced. A second disc is selected. Copy and complete the tree diagram showing all the probabilities and outcomes.

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.