P4. Probability

Essential Question: How is an independent event defined?

Activation

How are these two situations different:

There are 5 marbles in a bag what is the probability of getting a red one on the second try if three are red and 2 are blue if you choose a marble and replace it?

There are 5 marbles in a bag what is the probability of getting a red one on the second try if three are red and 2 are blue if you choose a marble but keep it out?

P4. Probability

Independence: When the outcome of one event does not impact the outcome of another event.

Probability

If all outcomes are successful, the probability will be 1

If no outcomes are successful, the probability will be 0

So…Probability is 0 ≤ P ≤ 1

outcomes possible allresponses desired of # TheyProbabilit

ExamplesWhat is the probability of getting an ace from a deck of 52 cards?

What is the probability of rolling a 3 on a 6 sided die?

More ExamplesWhat is the probability of rolling an even number?

More ExamplesWhat is the probability of getting a total of 5 when a red die and green die is rolled?

+ 1 2 3 4 5 61 2 3 4 5 6 72 3 4 5 6 7 83 4 5 6 7 8 94 5 6 7 8 9 105 6 7 8 9 10 116 7 8 9 10 11 12

More ExamplesWhat is the probability of getting 2 spades when 2 cards are dealt at the same time?

Home Work

Worksheet 4