Understanding Probability with a Spinner

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 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 is the probability of landing on a section labeled 4 if it is not on the spinner?

Back

The probability is 'impossible' or 0.

Front

How do you calculate the probability of an event?

Back

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

Front

If a spinner has 9 equal sections, what is the probability of landing on any one section?

Back

Front

What is the probability of landing on a number that appears multiple times on a spinner?

Back

Add the probabilities of each occurrence of that number.

Front

In a bag with 5 quarters, 2 dimes, and 4 pennies, what is the total number of coins?

Back

The total number of coins is 11.

Front

What is the probability of picking a quarter from the bag?

Back

Front

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

Back

An event is 'unlikely' if it has a low chance of happening, but it is still possible.