REVISITING PROBABILITY TREES In the next exercise we will again visit probability trees. Remember, probability trees are diagrams often used to determine the number of outcomes in an experiment. The probability tree at right is for a First Draw Second Draw marble-drawing experiment. Each time the marble drawn was replaced in the bag. There are three red marbles and two white marbles in the bag for the first draw. The first marble drawn was red. The second 3 W marble drawn was white. R = Red; W = White 3 W 1. The probability tree shows there will be draws from the bag. 2. The probability of drawing a red marble on the first draw will be 3. The probability of drawing a red marble on the second draw will be 4. The probability of drawing a red marble on the third draw will be 5. The probability of drawing a white marble on the first draw will be 6. The probability of drawing a white marble on the second draw will be 7. The probability of drawing a white marble on the third draw will be 8. The color of marble drawn on any of the draws [did/did not] affect the probability of the color of marble drawn on the next draw. Second Third The probability tree at right is for a First Draw Draw Draw marble-drawing experiment where the . 3 R marble drawn is not replaced in the bag. 3 R There are three red marbles and two white 3W marbles in the bag for the first draw. The 2 R 3R first marble drawn was red. The second 3W marble drawn was white. 3 W 2 R 3R R = Red; W = White; 3 = 2 3 W & W 9. The probability tree shows that there will be draws from the bag. 10. The probability of drawing a red marble on the first draw will be 11. The probability of drawing a red marble on the second draw will be 12. The probability of drawing a red marble on the third draw will be 13. The probability of drawing a white marble on the first draw will be 14. The probability of drawing a white marble on the second draw will be 15. The probability of drawing a red marble on the third draw will be 16. The color of marble drawn on any of the draws [did/did not] affect the probability of the color of marble drawn on the next draw