Objective
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Transcript of Objective
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ObjectiveSWBAT find the probability of simple events
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What is probability?
- used to measure the chance of an event happening
- ratio that compares the number of favorable outcomes to the number of possible outcomes.
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What two numbers is the probability of any event between?
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P(event) =# of favorable outcomes# of possible outcomes
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1. Suppose a number cube is rolled. What is the probability of rolling a 4 or a 5?
There are 2 numbers on the number cube that are a 4 or a 5: 4 and 5.There are 6 possible outcomes: 1, 2, 3, 4, 5, and 6.
Answer:
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A. AB. BC. CD. D
Example 1 CYP
A B C D
0% 0%0%0%
Suppose a number cube is rolled. What is the probability of rolling a number that is divisible by 3?
A. AnsA
B. AnsB
C. AnsC
D. AnsD
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1. Dionne drew a marble at random from a bag of marbles that contained 5 red marbles, 4 yellow marbles, 2 green marbles, and 1 pink marble. What is the probability of Dionne drawing a yellow marble?
2. What is the probability of drawing a pink or red marble?
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P(event) =# of favorable outcomes# of possible outcomes
What is the probability of tossing heads?
Theoretical Probability : what should occur in an experiment
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What is the probability of tossing heads?
Experimental Probability – What actually occurs when repeating a probability experiment many times.
Toss Outcome
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Example 1Use a Tree Diagram to Count Outcomes
GREETING CARDS A greeting card maker offers three birthday greetings in four possible colors, as shown below. Draw a tree diagram to find the number of cards that can be made from three greeting choices and four color choices.
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Example 1Use a Tree Diagram to Count Outcomes
You can draw a diagram to find the number of possible cards.
Answer: There are 12 possible cards.
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A. AB. BC. CD. D
Example 1 CYP
A B C D
0% 0%0%0%
A. 3B. 5C. 8D. 15
ICE CREAM An ice cream parlor offers a special on one-scoop sundaes with one topping. The ice cream parlor has 5 different flavors of ice cream and three different choices for toppings. How many different sundaes can be made?