9. REINFORCEMENT: You can use an area model to analyze probability situations that involve more than one stage. The following example involves selecting a marble (yellow, red, or blue) from one jar and a cube (yellow, red, or green) from another jar. R Y B G Jar 1 Jar 2 Compare the following Punnett square to a tree diagram representing the same scenario. Possibilities for Jar 2 Jar 1 Jar 2 R R Y G w/ - w / w / w/- R RR RY RG Each cell represents one outcome. Possibilities for Jar 1 RR RY RG R BR BY BG A/ - AIN YR YY YG w/ - w /- a. Find P(RY). b. Find P(at least one red). c. Find P(both being the same color). Advanced Mathematical Decision Making (2010) Activity Sheet 3, 4 pages