© 2010 Pearson Prentice Hall. All rights reserved. 1 §11.5, Probability with the Fundamental Counting Principle, Permutations, and Combinations.

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© 2010 Pearson Prentice Hall. All rights reserved. 1 §11.5, Probability with the Fundamental Counting Principle, Permutations, and Combinations

© 2010 Pearson Prentice Hall. All rights reserved. 2 Learning Targets I will compute probabilities with permutations. I will compute probabilities with combinations

© 2010 Pearson Prentice Hall. All rights reserved. 3 Example 1: Probability and Permutations Six jokes about books by Groucho Marx, George Carlin, Steven Wright, Greg Ray, Jerry Seinfeld, and Phyllis Diller are each written on one of six cards. The cards are placed in a hat and drawn one at a time. What is the probability that a man’s joke will be delivered first and a woman’s joke last? Solution:

© 2010 Pearson Prentice Hall. All rights reserved. 4 Use the Fundamental Counting Principle to find the number of permutations with a man’s joke first and a woman’s joke last: Example 1: Probability and Permutations continued

© 2010 Pearson Prentice Hall. All rights reserved. 5 Example 2: Probability and Combinations: Winning the Lottery Florida’s lottery game, LOTTO, is set up so that each player chooses six different numbers from 1 to 53. With one LOTTO ticket, what is the probability of winning this prize? Solution: Because the order of the six numbers does not matter, this situation involves combinations.

© 2010 Pearson Prentice Hall. All rights reserved. 6 Example 3: Probability and Combinations A club consists of five men and seven women. Three members are selected at random to attend a conference. Find the probability that the selected group consists of 3 men. Solution: Order of selection does not matter, so this is a problem involving combinations.

© 2010 Pearson Prentice Hall. All rights reserved. 7 Example 3: Probability and Combinations continued There are 220 possible three-person selections.

© 2010 Pearson Prentice Hall. All rights reserved. 8 Example 3: Probability and Combinations continued Homework: Pg 634 – 635, #1 – 18.