AP Stats Basic Probability

Front

What is the definition of probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

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CCSS.7.SP.C.5

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What does a probability of 0 indicate?

Back

A probability of 0 indicates that an event is impossible and will not occur.

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CCSS.7.SP.C.5

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What does a probability of 1 indicate?

Back

A probability of 1 indicates that an event is certain and will definitely occur.

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CCSS.7.SP.C.5

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What is the formula for calculating the probability of an event?

Back

The probability of an event is calculated as P(A) = Number of favorable outcomes / Total number of outcomes.

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CCSS.7.SP.C.7A

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What is the complement of an event?

Back

The complement of an event A, denoted as A', is the event that A does not occur.

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CCSS.HSS.CP.A.1

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How do you calculate the probability of the complement of an event?

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The probability of the complement of an event A is calculated as P(A') = 1 - P(A).

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CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.4

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What is conditional probability?

Back

Conditional probability is the probability of an event occurring given that another event has already occurred, denoted as P(A|B).

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CCSS.HSS.CP.A.3

CCSS.HSS.CP.A.5

Front

How do you calculate conditional probability?

Back

Conditional probability is calculated using the formula P(A|B) = P(A and B) / P(B).

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CCSS.HSS.CP.A.3

CCSS.HSS.CP.A.5

Front

What is the addition rule for probabilities?

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The addition rule states that P(A or B) = P(A) + P(B) - P(A and B) for any two events A and B.

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CCSS.HSS.CP.B.7

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What is the multiplication rule for independent events?

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For independent events A and B, the multiplication rule states that P(A and B) = P(A) * P(B).

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CCSS.HSS.CP.A.4

CCSS.HSS.CP.A.2