Geometry - Probability Review

Front

What is probability?

Back

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

Front

How do you calculate the probability of an event?

Back

Probability = (Number of favorable outcomes) / (Total number of possible outcomes).

Front

What is a sample space?

Back

A sample space is the set of all possible outcomes of a probability experiment.

Front

What is the probability of picking a blue bead from a bag containing 4 blue beads and 7 red beads?

Back

Probability = 4/(4+7) = 4/11.

Front

If the probability of an event is 0.3, what is the probability that the event does not occur?

Back

Probability of not occurring = 1 - Probability of occurring = 1 - 0.3 = 0.7.

Front

What does it mean if two events are independent?

Back

Two events are independent if the occurrence of one does not affect the occurrence of the other.

Front

What is the probability of flipping two coins and getting at least one head?

Back

Probability = 1 - Probability of getting no heads = 1 - (1/2 * 1/2) = 3/4.

Front

What is a favorable outcome?

Back

A favorable outcome is an outcome that is considered successful for the event we are interested in.

Front

How do you express probability as a percentage?

Back

To express probability as a percentage, multiply the probability by 100.

Front

What is the probability of rolling a 3 on a standard six-sided die?

Back

Probability = 1/6.