Probability and Likelihood

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 it mean if an event is 'certain'?

Back

An event is 'certain' if it will definitely happen, with a probability of 1.

Front

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

Back

An event is 'impossible' if it cannot happen at all, with a probability of 0.

Front

What does 'likely' mean in terms of probability?

Back

An event is 'likely' if it has a high chance of occurring, typically a probability greater than 0.5.

Front

What does 'unlikely' mean in terms of probability?

Back

An event is 'unlikely' if it has a low chance of occurring, typically a probability less than 0.5.

Front

What does 'equally likely' mean?

Back

Two or more outcomes are 'equally likely' if they have the same probability of occurring.

Front

If there are 2 sugar cookies and 10 chocolate chip cookies, what is the probability of selecting a sugar cookie?

Back

The probability is 2/(2+10) = 2/12 = 1/6, which is unlikely.

Front

If the probability of an event is 5/25, how can it be described?

Back

It can be described as 'unlikely' since 5/25 simplifies to 1/5.

Front

What is the probability of cows flying?

Back

The probability is 'impossible' because cows cannot fly.

Front

What is the likelihood of selecting a rose colored crayon if it is present?

Back

The likelihood is 'certain' if the crayon is available.