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7.5 Probability of Dependent Events

7.5 Probability of Dependent Events. 4/19/2013. Tell whether the events are independent or dependent. You randomly select 2 cards from a standard 52-card deck.

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7.5 Probability of Dependent Events

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  1. 7.5 Probability of Dependent Events 4/19/2013

  2. Tell whether the events are independent or dependent. You randomly select 2 cards from a standard 52-card deck. • What is the probability that the first card is not a face card and second card is a face card if you replace the first card before selecting the second card? • What is the probability that the first card is not a face card and second card is a face card if you do not replace the first card before selecting the second card.

  3. Independent Events Definition: 2 or more events that do not have an effect on the outcomes of each event . 2 or more events where one affects the occurrence of the other. Dependent Events Definition:

  4. Tell whether the events are independent or dependent. You randomly select 2 cards from a standard 52-card deck. • What is the probability that the first card is not a face card and second card is a face card if you replace the first card before selecting the second card? B. What is the probability that the first card is not a face card and second card is a face card if you do not replace the first card before selecting the second card. Independent Dependent

  5. A bag contains 12 blue marbles and 10 yellow marbles. What is the probability that you will pull blue marble then a yellow marble? =

  6. In a deck there are 52 cards, 4 of which are aces. What is the probability that you will pull 3 aces in a row? = = ● ● 2nd pull 1st pull 3rd pull

  7. Mrs. Kindred needs two students to help read an English passage in her class of 11 boys and 14 girls. If she randomly chooses one student to read, then another, what is the probability that both readers will be boys? 2nd choice 1st choice = =

  8. A bag of Scrabble letters has 3 As, 1 X, 2 Bs and 5 Es left. What is the probability that you will pull an A and then an E? 2nd pull 1st pull A X B E = E A B A E = E E

  9. You are on a soccer team and want to be goalkeeper in today’s game but it depends on the coach. If Scott coaches, you have a 60% chance, whereas if Andrew coaches, you have a 40% chance. However, Scott coaches 50% of the time. What is the probability that Scott will coach and youwillbe goalkeeper today?

  10. Homework WS 7.5 Skip #2, 8, 10 & 14 “PMS jokes aren’t funny. Period!”

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