Bell Work 1) into a decimal & a percent. 2) 0.84 into a fraction & a percent. 3) 49% into a decimal & a fraction. 5) (1) =
6) 1 = In Lesson 1.2.7, you calculated probabilities for single events and combinations of events when either one outcome or the other is desirable. You have also compared those probabilities to decide which outcomes are most likely. In this lesson, you will work with your study team to apply your knowledge of fractions to represent and calculate the probabilities of a variety of events.
As you work today, ask each other these questions to focus your discussion: How can probabilities be combined? How can the answer be rewritten in a different form? 1-130. Eustice is adding fractions. Here is his work: a. How do you think Eustice got his answer? Does his answer make sense? Discuss Eustices work with your team. Then explain your reasoning on your paper with words. b. Help Eustice find the correct answer.
1-131. Lindsay has a paper bag full of Fruiti Tutti Chews in three different fruit flavors. She says, If you reach into the bag, you have a chance of pulling out a Killer Kiwi. There is a chance that you will get Crazy Coconut. a. If you reach into the bag, what is P(coconut or kiwi)? b. Does there have to be another flavor in the bag? How can you tell? If so, assuming that there is only one other flavor, what is the probability of getting that flavor? c. How many candies might Lindsay have in the bag? Is there more than one possibility? Assume that all candies in the bag are whole candies.
1-132. Lyle asked for a challenge problem, and his teacher gave him this one: There is a chance of drawing a red marble out of a bag of marbles. If the probability of drawing a red or a blue marble is , what is the probability of drawing a blue marble? You may want to use the Probability eTool to simulate this problem. When Lyles teammates saw the challenge he was working on, they each had a different idea for how he should start. Mayra suggested that he start by rewriting and so that they have a common denominator. Kenessa disagreed. You want to set up a subtraction problem, she said. She
wrote the expression - to show the number Lyle needs to find. Darren had a different idea. The probability that you would draw either red or blue is the same as the probability of drawing red added to the probability of drawing blue, he said. He wrote this expression: +?= 1-132 cont. a. Which way would you suggest Lyle start working to find P(blue)? Discuss your ideas with your study team. Write a clear explanation of which method you recommend and why.
Include your ideas about whether the other strategies will solve the problem and why you did not choose them. b. What is the probability of drawing a blue marble? Explain your reasoning. 1-133. Louise is playing a game, but the spinner is incomplete. Each section of the spinner is labeled with the probability of spinning it. What fraction is missing? 1-134. Charles found a spinner his teacher was making. He knew that if he put his problem-solving skills to use, he would be able to figure out the
missing piece and finish the spinner for his teacher. What piece is missing? 1. Write an expression for the problem Charles needs to solve. Is there more than one way to do this? 2.Find the solution. Practice 1. One die, numbers 1,2,3,4,5, and 6 is rolled. What is the probability of rolling either a 1 or a 6? 2. A spinner is divided into eight equal sections. The sections are numbered 1,2,3,4,5,6,7, and 8. What is the probability of spinning a 2,3, or a 4?
3. Patty has a box of 12 colored pencils. There are 2 blue, 1 black, 1 gray, 3 red, 2 green, 1 orange, 1 purple, and 1 yellow in the box. Patty closes her eyes and chooses one pencil. She is hoping to choose a green or a red. What is the probability she will get her wish? 4. Use the spinners below to tell Paul what his chances are of getting the silver truck that he wants. Independent Practice 1.2.8
Find the missing fraction or percentage of each graph provided below. 1) 3) _________ 2) _________
_________ 1.2.8 Find the missing fraction or percentage of each graph provided below. 1) 3) _________
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