Exploring Unions and Intersections in Probability

The video tutorial explains how to calculate the probability of two events that are not mutually exclusive, using a Venn diagram. It classifies numbers 1 to 8 as either prime or odd, and demonstrates how to calculate the probability of choosing a prime or odd number (union) and the probability of a number being both prime and odd (intersection). The tutorial highlights the importance of adjusting for double-counting in the union calculation.

What does it mean for two events to be not mutually exclusive?

• They cannot occur at the same time.

• They can occur at the same time.

• They are always dependent.

• They are always independent.

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CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.4

What is the purpose of using a Venn diagram in this lesson?

• To categorize numbers as even or odd.

• To illustrate the intersection of two events.

• To show how events are mutually exclusive.

• To calculate the total number of events.

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CCSS.7.SP.C.8B

Why is the number 1 not considered a prime number?

• It is an even number.

• It is the same as its only divisor.

• It is not divisible by itself.

• It is not divisible by 1.

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CCSS.4.OA.B.4

Which number is both prime and odd?

• 6

• 2

• 3

• 4

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CCSS.4.OA.B.4

How many numbers from 1 to 8 are neither prime nor odd?

• 1

• 2

• 3

• 4

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CCSS.4.OA.B.4

What is the probability of choosing a prime number from 1 to 8?

• 6 out of 8

• 5 out of 8

• 4 out of 8

• 3 out of 8

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CCSS.7.SP.C.7B

What is the probability of choosing an odd number from 1 to 8?

• 3 out of 8

• 6 out of 8

• 4 out of 8

• 5 out of 8

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CCSS.7.SP.C.7B

Why do we subtract 3 out of 8 when calculating the probability of choosing a prime or odd number?

• To account for numbers that are neither prime nor odd.

• To simplify the calculation.

• To include all numbers in the sample set.

• To correct for overcounting numbers that are both prime and odd.

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CCSS.HSS.CP.B.7

What is the final probability of choosing a prime or odd number from 1 to 8?

• 6 out of 8

• 5 out of 8

• 4 out of 8

• 3 out of 8

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CCSS.HSS.CP.B.7

What is the probability of choosing a number that is both prime and odd from 1 to 8?

• 2 out of 8

• 3 out of 8

• 4 out of 8

• 5 out of 8