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 it mean if an event is 'certain'?

Back

An event is 'certain' if it is guaranteed to 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 is the probability of flipping heads on a fair coin?

Back

The probability is 1/2, meaning it is equally likely to land on heads or tails.

Front

What is the likelihood of rolling an even number on a six-sided die?

Back

The likelihood is 3/6 or 1/2, since there are three even numbers (2, 4, 6) out of six possible outcomes.

Front

What does 'likely' mean in terms of probability?

Back

'Likely' means that an event has a higher chance of occurring than not, typically a probability greater than 0.5.

Front

What does 'unlikely' mean in terms of probability?

Back

'Unlikely' means that an event has a lower chance of occurring than not, typically a probability less than 0.5.

Front

If an event has a probability of 3/8, how can we describe its likelihood?

Back

It is less likely to occur than to occur, as it is less than 0.5.

Front

What is a sample space in probability?

Back

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

Front

What is an event in probability?

Back

An event is a specific outcome or a set of outcomes from a probability experiment.