M302 Notes - M302 4/4/08 - Notes The probability of an...

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M302 4/4/08 - Notes The probability of an event is written as “P(the event)”. 1. P(an event) = number of favorable outcomes / total number of outcomes 2. Odds In favor of an event = number of favorable outcomes / number of unfavorable outcomes 3. Odds against an event = number of unfavorable outcomes / number of favorable outcomes Problem 3, pg 731 A) P(Spinner lands on red) = 3 fav / 6 total = ½ B) P(Spinner lands on Yellow) = 2/6 = 1/3 C) P(Spinner lands on Blue) = 1/6 Problem 9, pg 730 Number of favorable outcomes = Number of tickets that Don bought = 6. Number of unfavorable outcomes = 51 total tickets – 6 that Don bought = 45 Odds against Don winning the iPod = 45 unfavorable outcomes / 6 favorable outcomes = 15/2 or 15:2 Chapter11 is about counting the number of options. We learned tree diagrams, product tables, slots, & combinations! In chapter 12, we will be finding mostly probabilities and a tiny bit of odds, BUT we have to be experts at Ch.11 to do the harder problems in Ch.12.
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Problem 40, pg 704 (HW #24) 8 Girls, 7 Boys = 15 people. Order matters in performance. Use slots
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M302 Notes - M302 4/4/08 - Notes The probability of an...

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