Your Algebra 2 Test has 5 true/false and 15 multiple choice questions

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Presentation transcript:

Your Algebra 2 Test has 5 true/false and 15 multiple choice questions Your Algebra 2 Test has 5 true/false and 15 multiple choice questions. Each multiple choice question has 4 different answer choices. How many different ways for answering the 20 questions are possible? Problem of the Day

Section 0-5 Adding Probabilities

Objectives Compute theoretical and experimental probabilities. Compute probabilities of compound events. Objectives

Probability is a measure of the chance that a given event E will occur. Vocabulary

Example 1 You pick a card from a standard deck of 52 playing cards. Find the probability of picking the following: a face card a king a club Example 1

You have 40 marbles in a bag You have 40 marbles in a bag. There are 14 white, 16 black, 3 red, and 7 yellow. Find the probability of picking the following: A black marble Not a yellow marble Example 1

Mutually exclusive events are events that cannot occur at the same time. Vocabulary

Addition Rules for Probability If two events A and B are mutually exclusive, the probability that A or B will occur is: P(A or B) = P(A) + P(B) If two events A and B are not mutually exclusive, the probability that A or B will occur is: P(A or B) = P(A) + P(B) – P(A and B) Vocabulary

Determine whether the events are mutually exclusive or not mutually exclusive. Then find the probability: Keisha has a stack of 8 baseball cards, 5 basketball cards, and 6 hockey cards. If she selects a card at random from the stack, what is the probability that it is a baseball or a hockey card? Example 2

Determine whether the events are mutually exclusive or not mutually exclusive. Then find the probability: Suppose that of 1400 students, 550 take Spanish, 700 take biology, and 400 take both Spanish and biology. What is the probability that a student selected at random takes Spanish or biology? Example 2

p.P15 #2 – 7 Homework