This document introduces probability and how it is calculated. Probability is defined as the number of desired outcomes divided by the total number of possible outcomes. Examples are given of calculating the probability of rolling a 2 on a standard die or drawing a Queen of clubs from a standard 52-card deck. The document also states that the probability of all events happening is 1 or 100% and the probability of an event not happening is 1 minus the probability of the event happening. Homework problems from page 324 numbers 1-8 are assigned.

1. UNIT 3:
PROBABILITY

2. Probability of an # of desired outcomes
=
Event total # of possibilities
This means quot;the probability of getting
EX Roll a standard die. a 2quot; is......
P(2) =
P(odd #) =
The EVENT is always in the
brackets.

3. EX Pick a card randomly from a standard deck. (52)
P(Queen of clubs) =
P(Ace) =
P(diamond) =
P(red card) =

4. The probability of all events happening
is 1 or 100%.
Therefore....the probability of an event NOT HAPPENING IS:
1 ­ P(event happening)

5. EX If the chance of you winning a game is 0.41, then
what is the chance of losing the game?

7. HOMEWORK
p.324; #1­8