Probability Likelihood

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 'certain' mean in probability?

Back

'Certain' means that an event will definitely happen, with a probability of 1.

Front

What does 'impossible' mean in probability?

Back

'Impossible' means that an event cannot happen at all, with a probability of 0.

Front

What does 'likely' mean in probability?

Back

'Likely' means that an event has a high chance of occurring, typically a probability greater than 0.5.

Front

What does 'unlikely' mean in probability?

Back

'Unlikely' means that an event has a low chance of occurring, typically a probability less than 0.5.

Front

What is the probability of flipping heads on a fair coin?

Back

The probability is 0.5, or 'as likely as not'.

Front

If an event has a probability of 3/8, what can we say about its likelihood?

Back

It is less likely to occur than to not occur.

Front

What is the probability of rolling a total of 15 with two dice?

Back

It is impossible to roll a total of 15 with two six-sided dice.

Front

What does 'equally likely' mean?

Back

'Equally likely' means that two or more outcomes have the same chance of occurring.

Front

How do you calculate the probability of an event?

Back

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