Simple Probability

Front

What is probability?

Back

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

Front

What does P(A) represent?

Back

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

Front

What does P(not A) represent?

Back

P(not A) represents the probability of event A not occurring.

Front

If a die is rolled, what is the total number of possible outcomes?

Back

6 (the numbers 1, 2, 3, 4, 5, and 6).

Front

What is the probability of rolling a 3 on a die?

Back

1/6.

Front

What is the probability of rolling an even number on a die?

Back

1/2 (the even numbers are 2, 4, and 6).

Front

What is an unlikely event in probability?

Back

An unlikely event is one that has a probability close to 0.

Front

What is a likely event in probability?

Back

A likely event is one that has a probability close to 1.

Front

If you have a bag with 3 red marbles and 2 blue marbles, what is the probability of picking a blue marble?

Back

2/5.

Front

What is the probability of an event that is certain to happen?

Back

1.