Chapter 11 - School District #35

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Name: ___________________________________________________ Date: ______________ Working Example 2: Calculating Probabilities Using a Tree Diagram and Multiplication Jason rolls a 4-sided die and spins the spinner. What is the probability of rolling an even number and spinning a B? Show your answer using a tree diagram and multiplication. Solution Tree Diagram: 2 3 A C B Die Spinner Outcomes There are possible outcomes. 1 A B C 1, A 1, B 1, C There are favourable outcomes (look for even numbers with Bs). 2 Even numbers end in 0, 2, 4, 6, … P (even number and B) = favourable outcomes possible outcomes = Multiplication: favourable outcomes Die: P (even number) = Spinner: P (B) = possible outcomes favourable outcomes possible outcomes = 4 P(even number, B) = P(even number) × P(B) = 3 = × 4 3 = 614 MHR ● Chapter 11: Probability Both methods give the same result.
Name: _____________________________________________________ Date: ______________ You roll a 4-sided die and spin the spinner. Find the probability of rolling a 4 and spinning B. Check your answer using multiplication. Tree diagram: 2 3 B A Die 1 Spinner A B Outcomes 1, A 1, B 2 P (4, B) = favourable outcomes possible outcomes = Multiplication: Die: favourable outcomes P (4) = Spinner: possible outcomes P (B) = favourable outcomes possible outcomes = 4 = 2 P(4) × P(B) = × = 11.3 Determining Probabilities Using Fractions ● MHR 615
Page 1 and 2: CHAPTER 11 Probability GET READY 58
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Page 55: Wrap It Up!, page 631 7. a) Flip #1

Chapter 11 - School District #35

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