Basic Probability

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 a probability of 0 mean?

Back

A probability of 0 means that the event cannot happen.

Front

What does a probability of 1 mean?

Back

A probability of 1 means that the event is certain to happen.

Front

What is the probability of an event that is equally likely to happen or not happen?

Back

The probability is 0.5 or 50%.

Front

How do you calculate the probability of an event?

Back

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

Front

If there are 3 green marbles and 7 total marbles, what is the probability of picking a green marble?

Back

P(green) = 3/7.

Front

What is the probability of not picking a green marble if there are 3 green marbles in a total of 10 marbles?

Back

P(not green) = 7/10.

Front

What is a sample space in probability?

Back

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

Front

If you flip a coin, what are the possible outcomes?

Back

The possible outcomes are heads or tails.

Front

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

Back

P(rolling a 3) = 1/6.