1.A true-false quiz has five questions. Use the Fundamental Counting Principle to find the total number of ways that you can answer the quiz. 2. You spin.

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Presentation transcript:

1.A true-false quiz has five questions. Use the Fundamental Counting Principle to find the total number of ways that you can answer the quiz. 2. You spin the spinner and flip a coin. Find the probability of Spinning a 1 and flipping heads

1 st pick 2 nd pick 1 st pick 2 nd pick Experiment 2, keeping first cube out

You randomly guess the answers to two questions on a multiple-choice test. Each question has three choices: A, B, and C. a.What is the probability that you guess the correct answers to both questions? b. Suppose you can eliminate one of the choices for each question. How does this change the probability that your guesses are correct? You spin the spinner, flip a coin, then spin the spinner again. Find the probability of the compound event. Spinning an even number, flipping tails, then spinning an odd number

12. 9

You have a bag with two green cubes and one pink cube. Draw a tree diagram to show the sample space of choosing one cube, putting it back, and then choosing another cube. Now draw a tree diagram of choosing two cubes without putting the first one back. What is the probability that I will chose two greens in the first example? What is the probability that I will choose two greens in the second example?

When more than one event is occurring you If the events It is called For example:

If I roll a die twice, what is the probability that I will get a 3 first, and then a 4? ______________ Probability of a 3 ______________ Probability of a 4 Kelly and Ellie play on a softball team. Kelly has 8 hits out of 20 and Ellie has 6 out of 16 hits so far. What is the probability they will both get a hit next time at bat? ______________ Probability Kelly ______________ Probability Ellie