Probability Review

Front

What is Probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1.

Front

What does P(A) represent?

Back

P(A) represents the probability of event A occurring.

Front

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

Back

The formula is P(A) = Number of favorable outcomes / Total number of possible outcomes.

Front

What is the complement of an event A?

Back

The complement of event A, denoted as P(not A), is the probability that event A does not occur.

Front

If P(A) = 1/4, what is P(not A)?

Back

P(not A) = 1 - P(A) = 1 - 1/4 = 3/4.

Front

What are Independent Events?

Back

Independent events are events where the outcome of one event does not affect the outcome of another.

Front

What are Dependent Events?

Back

Dependent events are events where the outcome of one event affects the outcome of another.

Front

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

Back

For independent events A and B, P(A and B) = P(A) * P(B).

Front

What is the probability of spinning red on a spinner with 4 equal sections: 1 red, 1 blue, 2 green?

Back

P(red) = 1/4.

Front

What is the probability of picking a red marble from a bag containing 2 red, 3 green, and 3 blue marbles?

Back

P(red) = 2/8 = 1/4.