What is probability?

• Probability is how likely something will occur

• Think of probability as the chance that something can or cannot happen.

For example...

IF I toss a quarter, what is the probability that I will get heads? This is really asking what is the chance that I will land on heads?

What is the probability?

When you toss a coin, the chance that it will land on heads is 1 out of 2. This is because there is 1 side that is heads and there are two total options.

Different ways to write probability

You could say that there is a 1/2 chance or 1 out of 2 chance or 50% chance

Probability of the Spinner

• Look at the spinner at your right.

• How many possible outcomes are there?

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