Understanding Probability

Front

Probability is a measure of how likely it is that a specific outcome will occur.

Back

Probability is expressed as a number between 0 and 1, where 0 means the event never happens and 1 means it always happens.

Front

An event with a probability of 100% will always happen.

Back

An event with a probability of 0% will never happen.

Front

To calculate the probability of a specific outcome, use a ratio.

Back

The ratio is the number of occurrences of a specific outcome divided by the total number of possible outcomes.

Front

Probability scale from 0% to 100%.

Back

The probability scale shows the likelihood of events from impossible to certain.

Front

In board games, probability can be calculated for specific events.

Back

The specific outcome we consider is called the favorable outcome, used to predict probability.

Front

Definition of Probability

Back

Probability is a mathematical measurement of the likelihood of a certain event occurring. It can be expressed as a ratio, a decimal, or a percent.

Front

Formula for Probability

Back

Probability of event A = P(A) = \frac{\text{number of times the favorable event occurs}}{\text{total number of times any event will occur}}

Front

Number of Outcomes for a Coin

Back

A coin has 2 possible outcomes: Heads or Tails.

Front

Number of Outcomes for a Number Cube

Back

A number cube has 6 possible outcomes: 1, 2, 3, 4, 5, or 6.

Front

Number of Outcomes for a Standard Deck of Cards

Back

A standard deck of cards has 52 possible outcomes.