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Making Predictions Based On Theoretical Probability We are learning to…find theoretical probability and then make a prediction based on the probability. Sunday, April 28, 2013 ¼ ¼ What is the theoretical Yellow Blue probability of spinning a yellow? ½ ½ Red Green Blue ¼ ¼ The probability of spinning a yellow is ¼…because ¼ of the spinner is yellow. If you would spin the spinner 100 times how many times would you expect to get yellow? Probability of spinning 1 Number of times spinning yellow 1 25 yellow is… So… 4 Total number of times spinning 4 25 25 If you spin the spinner 100 times you would expect to have the result of yellow 25 times. 100 ¼ ¼ What is the theoretical Yellow Blue probability of spinning a red ½ ½ Red 1/ 8 Green Blue ¼ The probability of spinning a red is ¼ 1/ 1/ …because 1/ of the spinner is red. 8 8 8 If you would spin the spinner 1000 times how many times would you expect to get red? Probability of spinning 1 Number of times spinning red 1 125 red is… So… 8 Total number of times spinning 8 125 125 If you spin the spinner 1000 times you would expect to have the result of red 125 times. 1000 1/ ¼ ¼8 What is the theoretical Yellow Blue 1/ probability of spinning a blue 8 Red 1/ Green 8 1 1 2 1 3 Blue ¼ 1/ 4 8 8 8 8 8 The probability of spinning a blue is 3/ …because 3/ of the spinner is blue. 8 8 If you would spin the spinner 800 times how many times would you expect to get blue? Probability of spinning 3 Number of times spinning blue 3 100 blue is… So… 8 Total number of times spinning 8 100 300 If you spin the spinner 800 times you would expect to have the result of blue 300 times. 800 Group Practice In an experiment Yolanda is rolling a number cube and spinning a spinner with the number 2, 5, 8, and 11. She then finds the sum of the two results. 2 5 8 11 Step 1: With your group create a Tree Diagram or Area Model that could be used to find all the possible outcomes of this experiment. Step 2: Then with your group find the Theoretical Probability of several different events and predict the number of outcomes for that event. Step 3: Finally show your teacher your solutions to move on to your homework assignment.

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posted: | 4/29/2013 |

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