Understanding 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 has a probability of 0?

Back

It means the event is impossible and will not occur.

Front

What does it mean if an event has a probability of 1?

Back

It means the event is certain and will definitely occur.

Front

What is the probability of landing on a number in a spinner with equal sections?

Back

The probability is calculated by dividing the number of favorable outcomes by the total number of outcomes.

Front

If a spinner has 5 equal sections numbered 1 to 5, what is the probability of landing on 3?

Back

1/5

Front

What is the probability of NOT landing on a specific number in a spinner?

Back

It is calculated as 1 minus the probability of landing on that number.

Front

What is the probability of choosing a green marble from a bag containing 2 blue, 3 red, and 4 green marbles?

Back

4/9

Front

What does 'certain' mean in probability?

Back

It means that the event will definitely happen.

Front

What does 'impossible' mean in probability?

Back

It means that the event cannot happen at all.

Front

If the probability of an event is 7/7, how would you describe it?

Back

Certain.