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, or as a percentage.

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 or 100%.

Front

What is the probability of an impossible event?

Back

The probability of an impossible event is 0 or 0%.

Front

How can probability be expressed?

Back

Probability can be expressed as a fraction, a decimal, or a percent.

Front

If a bag contains 4 red marbles and 6 blue marbles, what is the probability of picking a red marble?

Back

The probability of picking a red marble is 4/10 or 40%.

Front

What is the formula for calculating probability?

Back

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

Front

In a spinner divided into 8 equal sections, what is the probability of landing on an even number?

Back

The probability of landing on an even number is 4/8 or 1/2.

Front

If you roll a die, what is the probability of rolling a number greater than 4?

Back

The probability of rolling a number greater than 4 is 2/6 or 1/3.

Front

What does it mean if two events are independent?

Back

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

Front

What is a sample space in probability?

Back

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