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 it mean if an event is 'certain'?

Back

An event is 'certain' if it will definitely happen. For example, the sun will rise tomorrow.

Front

What does it mean if an event is 'impossible'?

Back

An event is 'impossible' if it cannot happen at all. For example, rolling a 7 on a standard six-sided die.

Front

What is an example of a 'probable' event?

Back

A 'probable' event is one that is likely to happen, such as it raining tomorrow if the forecast predicts rain.

Front

What is an example of an 'unlikely' event?

Back

An 'unlikely' event is one that is not expected to happen, such as winning the lottery.

Front

How do you calculate the probability of an event?

Back

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

Front

What is a tree diagram?

Back

A tree diagram is a visual representation that shows all possible outcomes of an event, helping to calculate probabilities.

Front

If you roll a die, how many possible outcomes are there?

Back

There are 6 possible outcomes when rolling a standard six-sided die: 1, 2, 3, 4, 5, or 6.

Front

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

Back

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

Front

What is the probability of flipping heads on a coin?

Back

The probability of flipping heads on a fair coin is 1/2.