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 and 1.

Front

What does P(not A) represent?

Back

P(not A) represents 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 is an unlikely chance event?

Back

An unlikely chance event is closer to the number 0.

Front

What is the probability of rolling a two on a 6-sided die?

Back

The probability of rolling a two is 1/6.

Front

What is the probability of rolling an even number on a 6-sided die?

Back

The probability of rolling an even number (2, 4, or 6) is 3/6 or 1/2.

Front

How do you calculate the theoretical probability of an event?

Back

Theoretical probability is calculated as the number of favorable outcomes divided by the total number of possible outcomes.

Front

In a bag with 3 red, 2 blue, and 4 yellow marbles, what is the probability of pulling a red marble?

Back

The probability of pulling a red marble is 3/9 or 1/3.

Front

What is the total number of outcomes when rolling a 6-sided die?

Back

The total number of outcomes when rolling a 6-sided die is 6.

Front

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

Back

The probability of an event that is certain to happen is 1.