Understanding Independent Probability Events

The video tutorial explains independent probability events using two groups of shapes. It covers the concept of independent events, where the outcome of one event does not affect the other. The tutorial demonstrates calculating the probability of drawing a star from the first group and an arrow from the second group, emphasizing the multiplication of probabilities for independent events. It concludes with a mnemonic to remember that 'and' in probability means to multiply, not add.

What are the two groups mentioned in the video?

• Group one has two crosses and five stars; Group two has four hearts and two arrows.

• Group one has a circle and three stars; Group two has two hearts and four arrows.

• Group one has three hearts and three arrows; Group two has a cross, four stars, and a circle.

• Group one has a cross, four stars, and a circle; Group two has three hearts and three arrows.

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CCSS.HSS.CP.A.5

What defines independent events in probability?

• Events that affect each other.

• Events that are mutually exclusive.

• Events that do not affect each other.

• Events that occur simultaneously.

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How many stars are there in the first group?

• Three

• Four

• Six

• Five

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CCSS.7.SP.C.7B

What is the probability of drawing a star from the first group?

• 6/7

• 4/7

• 5/7

• 3/7

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CCSS.1.MD.C.4

How many arrows are there in the second group?

• Four

• Five

• Three

• Two

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CCSS.7.SP.C.7B

What is the probability of drawing an arrow from the second group?

• 1/2

• 2/3

• 3/6

• 4/6

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How do you calculate the probability of two independent events occurring together?

• Divide the probabilities of each event.

• Subtract the probabilities of each event.

• Multiply the probabilities of each event.

• Add the probabilities of each event.

What is the combined probability of drawing a star and then an arrow?

• 4/7

• 3/7

• 2/7

• 1/7

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CCSS.HSS.CP.A.2

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What is the mnemonic to remember the rule for independent events?

• A and D for Add

• A and D for Multiply

• A and D for Divide

• A and D for Subtract

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CCSS.HSS.CP.A.5

Why are the events of drawing a star and an arrow considered independent?

• Because they occur at the same time.

• Because choosing a star affects drawing an arrow.

• Because choosing a star does not affect drawing an arrow.

• Because they are mutually exclusive.

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CCSS.HSS.CP.A.5