Probability intro

Intro to Probability

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

Poll

What information is needed to find the probability?

• all the different outcomes

• how many of each option

Probability of the Spinner

• Look at the spinner at your right.

• How many possible outcomes are there?

Multiple Select

What is the probability of the spinner landing on blue?

• 2/10

• 1/5

• 2/8

• 1/2

Multiple Choice

What is the probability of the spinner landing on yellow?

• 20%

• 10%

• 40%

• 30%

Multiple Choice

What is the probability of the spinner NOT landing on orange?

• 1/10

• 1/2

• 9/10

Multiple Choice

What is the probability of the spinner landing on green?

• 1/10

• 4/10

• 2/10

• 0/10

How do you feel about this lesson? (type in the chat)

• Type 1 if you feel like it made sense/was easy

• Type 2 if you kind of understood it but need more help

• Type 3 if it didn't make sense at all

Poll

How do you feel about this lesson?

• It made sense/was easy

• I need a little more help

• I don't understand it at all