Calculating Conditional Probability in Depth

The video tutorial explains the concepts of probability and conditional probability using the example of Rahul's eating habits. It introduces events A and B, representing eating a bagel for breakfast and pizza for lunch, respectively. The tutorial discusses the probabilities of these events and demonstrates how to calculate the conditional probability of one event given the other. It highlights the dependency between the events and provides a step-by-step calculation of the probability of B given A.

What are Rahul's two favorite foods?

• Bagels and Pizza

• Burgers and Fries

• Sushi and Tacos

• Pasta and Salad

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CCSS.RI.11-12.3

CCSS.RI.6.3

CCSS.RI.7.3

CCSS.RI.8.3

CCSS.RI.9-10.3

What does event A represent?

• Rahul eats a bagel for breakfast

• Rahul eats pizza for lunch

• Rahul eats a salad for lunch

• Rahul eats a sandwich for dinner

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CCSS.HSS.CP.A.1

What is the probability that Rahul eats a bagel for breakfast?

• 0.8

• 0.7

• 0.6

• 0.5

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CCSS.7.SP.C.5

What is the probability that Rahul eats pizza for lunch?

• 0.4

• 0.6

• 0.7

• 0.5

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CCSS.7.SP.C.5

What is the conditional probability that Rahul eats a bagel for breakfast given that he eats pizza for lunch?

• 0.7

• 0.6

• 0.5

• 0.8

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CCSS.HSS.CP.A.3

CCSS.HSS.CP.A.5

What does it mean if the probability of A given B is different from the probability of A?

• Events A and B are independent

• Event B is impossible

• Events A and B are dependent

• Event A is impossible

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CCSS.HSS.CP.A.3

What is the probability of both A and B happening?

• 0.3

• 0.35

• 0.45

• 0.4

What equation is used to find the probability of B given A?

• P(A and B) = P(A) * P(B)

• P(A and B) = P(A) + P(B)

• P(A and B) = P(A given B) * P(B)

• P(A and B) = P(B given A) * P(A)

What is the probability of B given A?

• 0.55

• 0.58

• 0.65

• 0.6

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CCSS.HSS.CP.B.6

What does the final result indicate about the relationship between events A and B?

• They are equally likely

• They are mutually exclusive

• They are dependent

• They are independent

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CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.4