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Lesson Menu Five-Minute Check (over Lesson 7–3) Main Idea and Vocabulary Key Concept: Probability Example 1:Find Probability Example 2:Find Probability Example 3:Find Probability of the Complement Example 4:Find Probability of the Complement

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Main Idea/Vocabulary outcomes simple event probability Find and interpret the probability of a simple event. random complementary events

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KC 1 Interactive Lab: Probability and Area

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Example 1 Find Probability There are six equally likely outcomes on the spinner shown. Find the probability of landing on 1. There is one section of the spinner labeled 1. Answer:

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1.A 2.B 3.C 4.D Example 1 A number cube with sides labeled 1 through 6 is rolled. Find the probability of rolling a 4. A. B. C. D.

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Example 2 Find Probability There are six equally likely outcomes on the spinner shown. Find the probability of landing on 2 or 4. The word or indicates that the number of favorable outcomes needs to include the section labeled 2 and the section labeled 4. There is one section of the spinner labeled 2 and one section labeled 4. Answer:

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1.A 2.B 3.C 4.D Example 2 A number cube with sides labeled 1 through 6 is rolled. Find the probability of rolling a number greater than 3. A. B. C. D.

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Example 3 Find Probability of the Complement There are six equally likely outcomes on the spinner shown. The spinner is spun once. Find the probability of not landing on 6. The probability of not landing on 6 and the probability of landing on 6 are complementary. So, the sum of the probabilities is 1.

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Example 3 Find Probability of the Complement Answer:

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1.A 2.B 3.C 4.D Example 3 A number cube with sides labeled 1 through 6 is rolled. Find the probability of not rolling an even number. A. B. C. D.

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Example 4 SPORTS A sportscaster predicted that the Tigers had a 75% chance of winning tonight. Describe the complement of this event and find its probability. Find Probability of the Complement The complement of winning is not winning. The sum of the probabilities is 100%. Think 75% plus what number equals 100%?

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Example 4 Answer: So, the probability that the Tigers will not win tonight is 25%. Find Probability of the Complement

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1.A 2.B 3.C 4.D Example 4 A.20% B.25% C.45% D.50% SLEEPOVER Celia guesses the probability that her parents will allow her to sleep over at her best friend’s house tonight is 55%. What is the probability that Celia will not be allowed to sleep over?

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End of the Lesson

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Resources Five-Minute Check (over Lesson 7–3) Image Bank Math Tools Animation Menu Probability and Area

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Animation Menu 7-27-2 Circle GraphsCircle Graphs 7-87-8 Estimating With PercentsEstimating With Percents

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1.A 2.B 3.C 4.D Five Minute Check 1 A.0.105 B.0.15 C.1.05 D.1.5 Express 15% as a decimal. (over Lesson 7-3)

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1.A 2.B 3.C 4.D Five Minute Check 2 A.8.0 B.0.8 C.0.08 D.0.008 Express 8% as a decimal. (over Lesson 7-3)

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1.A 2.B 3.C 4.D Five Minute Check 3 A.70% B.30% C.7% D.3% Express 0.3 as a percent. (over Lesson 7-3)

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1.A 2.B 3.C 4.D Five Minute Check 4 A.0.55% B.5.5% C.45% D.55% Express 0.55 as a percent. (over Lesson 7-3)

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1.A 2.B 3.C 4.D Five Minute Check 5 A.300% B.301% C.310% D.330% Write three and one hundredths as a percent. (over Lesson 7-3)

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1.A 2.B 3.C 4.D Five Minute Check 6 A.75.0 B.7.5 C.0.75 D.0.075 Dollar bills are made of special paper that is 75% cotton and 25% linen. Write 75% as a decimal. (over Lesson 7-3)

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