Probability: Likely vs Unlikely Events Flashcard

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 a probability of 0.5 indicate?

Back

A probability of 0.5 indicates an equal chance of an event occurring or not occurring, often referred to as a '50/50 chance.'

Front

If an event has a probability of 0.3, is it likely or unlikely to occur?

Back

Unlikely.

Front

What is an example of a likely event when rolling a fair six-sided die?

Back

Rolling a number greater than 2.

Front

True or False: An event with a probability of 0.9 is more likely to occur than an event with a probability of 0.2.

Back

True.

Front

What is the probability of rolling a 15 with a pair of dice?

Back

Impossible.

Front

What is the probability of choosing a black or white marble from a bag if the probability is 3/5?

Back

3/5.

Front

What does it mean if an event is described as 'unlikely'?

Back

It means that the event has a low probability of occurring, typically less than 0.5.

Front

What is the probability range for any event?

Back

The probability of any event ranges from 0 (impossible) to 1 (certain).

Front

What is a certain event?

Back

A certain event is an event that has a probability of 1, meaning it will definitely occur.