1. Do Now: Discovery Activity
3 minutes

2. Addition Rule
Unit 3: Probability

3. Objectives
Calculate the probability of one event or another occurring using the General Addition Rule.
Conclude through discovery that the probability of one mutually exclusive event or the other is P(A) + P(B).
GRIT
Works independently with focus
RESPECT
Knows when and how to include others
RESPONSIBILITY
Gets to work right away rather than procrastinating
LOVE OF LEARNING
Is eager to explore new things

4. The Addition Rule Or Add! Mutually Exclusive Events Independent Events
Mutually Exclusive Events
Independent Events
Conditional Events
Addition Rule
Probability of A or B
P(AUB)
Or Add!

5. 41 40 42 43 45 44 39 38 33 32 34 35 37 36 46 47 56 55 57 58 60 59 54 53 49 48 50 51 52 31 30 9 8 10 11 13 12 7 6 1
End 2 3 5 4 15 14 25 24 26 27 29 28 22 23 17 16 19 18 20 21
Your Understanding
Male
Female
Total
Democrat 47 13
 60
Republican 36 4
 40
 83
 17
 100
 What is the probability that a randomly selected senator is a female OR a democrat?

6. CUSS
The Gable Construction Corporation has placed bids for installing electronic message boards on two different highways. Because of competition from other companies, Gable Construction Corporation officials estimate that the probability that they will be awarded the Macon Expressway contract is 0.65 and the probability that they will be awarded the Seaview Expressway contract is Furthermore, the probability that they will be awarded both contracts is What is the probability that they will be awarded the contract for either the Macon Expressway or the Seaview Expressway.

7. Independent Practice and Homework
Khan Academy: “Multiplying Dependent Probabilities” and “Adding Probabilities”
Gall-up Poll Project Check-in: Topic and Survey Questions to be ed to by Friday 2/13.