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Lesson Menu Five-Minute Check (over Lesson 15–1) Main Idea and Vocabulary Key Concept: Probability Example 1:Use Fractions to Describe Probability Example 2:Real-World Example Make a Prediction
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Main Idea/Vocabulary I will use fractions to describe probability. favorable outcome
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KC
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Example 1 Use Fractions to Describe Probability One marble is chosen from the bag. Find the probability that a red marble is chosen.
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Example 1 Use Fractions to Describe Probability P(event) = number of favorable outcomes number of possible outcomes P(red) = 6 16 P(red) = 3 8 number of red marbles total number of marbles Simplify. Answer: So, the probability of choosing a red marble is. 3 8
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1.A 2.B 3.C 4.D Example 1 B. 1 8 One marble is chosen from the bag. Find the probability that a blue marble is chosen. D. 4 16 A. 3 8 C. 1 2
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Example 2 Jamal is making a beaded belt. Each packet of beads comes in the colors shown in the table. If Jamal takes one bead without looking, what is the probability that he gets a blue or green bead? There are 12 + 18 + 24 + 6 or 60 beads in all. There are 18 + 24 or 42 beads that are either blue or green.
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Example 2 P(event) = number of favorable outcomes number of possible outcomes P(blue or green) = 18 + 24 12 + 18 + 24 + 6 = 42 60 = 7 10 blue or green beads total number of beads Add. Simplify. Answer: So, the probability that Jamal will get a blue or green bead is. 7 10
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1.A 2.B 3.C 4.D Example 2 Looking at the chart below, what is the probability of picking a red or a yellow bead at random? B. 5 8 D. 3 10 A. 3 8 C. 1 8
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End of the Lesson End Lesson
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Resources Five-Minute Check (over Lesson 15–1) Image Bank Math Tool Chest Make a Prediction
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1.A 2.B 3.C 4.D 5.E Five Minute Check 1 (over Lesson 15–1) One card is drawn without looking. Describe the probability of drawing an even number rather than an odd number. A.impossible B.likely C.equally likely D.unlikely E.certain
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1.A 2.B 3.C 4.D 5.E Five Minute Check 2 (over Lesson 15–1) One card is drawn without looking. Describe the probability of drawing 5 rather than 8. A.impossible B.likely C.equally likely D.unlikely E.certain
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1.A 2.B 3.C 4.D 5.E Five Minute Check 3 (over Lesson 15–1) One card is drawn without looking. Describe the probability of drawing 2 rather than 7. A.impossible B.likely C.equally likely D.unlikely E.certain
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1.A 2.B 3.C 4.D 5.E Five Minute Check 4 (over Lesson 15–1) One card is drawn without looking. Describe the probability of drawing 9. A.impossible B.likely C.equally likely D.unlikely E.certain
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1.A 2.B 3.C 4.D 5.E Five Minute Check 5 (over Lesson 15–1) One card is drawn without looking. Describe the probability of drawing an even or an odd number. A.impossible B.likely C.equally likely D.unlikely E.certain
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