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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What does a probability of 0 indicate?

Back

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

Front

What does a probability of 1 indicate?

Back

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

Front

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.

Front

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.

Front

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).

Front

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).

Front

How do you calculate conditional probability?

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

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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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).