Unit #5 ~ Probability
Unit #5 Review Sheet Answers:
Simple Probability
P(red) = 1/3 P(yellow) = 0 P(blue or green) = 2/3
P(not blue) = 13/15 P(green) = 8/15 P(green, blue, or red) = 1
Predictions Made from Simple Probabilities
I would expect 189 of the 350 shoppers to use the online customer service to track packages.
I would expect Cleveland to make about 37 errors when typing a 550-word essay.
Tree Diagrams
Total number of possible outcomes - 24
(strawberry, small) (strawberry, medium) (strawberry, large) (strawberry, jumbo)
(banana, small) (banana, medium) (banana, large) (banana, jumbo)
(pineapple, small) (pineapple, medium) (pineapple, large) (pineapple, jumbo)
(raspberry, small) (raspberry, medium) (raspberry, large) (raspberry, jumbo)
(blueberry, small) (blueberry, medium) (blueberry, large) (blueberry, jumbo)
(cherry, small) (cherry, medium) (cherry, large) (cherry, jumbo)
Fundamental Counting Principle (FCP)
4 • 5 • 2 = 40 different outfits
10 • 8 • 12 = 960 different deluxe skateboards
Independent Probability
P(# ≥ 6, red) 3/8 • 1/5 = 3/40
P(odd #, green) 4/8 • 1/5 = 1/10 P(4, not purple) 1/8 • 4/5 = 1/10
P(7, orange or yellow) 1/8 • 2/5 = 1/20 P(prime #, orange) 4/8 • 1/5 = 1/10
Dependent Probability
P(red, yellow) 4/15 • 5/14 = 2/21 P(green, green) 6/15 • 5/14 = 1/7
P(green, yellow) 6/15 • 5/14 = 1/7 P(red, green) 4/15 • 6/14 = 4/35
P(orange, red) 0/15 • 4/14 = 0 P(not red, not red) 11/15 • 10/14 = 11/21
**Odds of an Event**
Odds of selecting a red king from a standard deck of 52 cards is 2:50
Odds of selecting a 4 of diamonds from a standard deck of cards is 1:51
Odds of selecting a heart or an 8 of spades from a deck of 52 cards is 14:38
Other Available Resources for Review:
Our textbook (www.classzone.com):
Animations (Chapter 7) ~ Introduction to Probability, Simple Probability (Chapter 12) ~ Finding Outcomes, Independent & Dependent Events
Practice, Practice, Practice (Chapter 7) ~ Lesson 8 (Chapter 12) ~ Lesson 4, 7, & 8
Assessment ~ Section Quizzes (Chapter 7) ~ Lesson 8 (Chapter 12) ~ Lesson 4, 7, & 8
The Math Dude (http://www.montgomeryschoolsmd.org/departments/itv/mathdude/):
Algebra 1 ~ Unit 5 ~ Probability, Sample Spaces
BrainPOP ~ http://www.brainpop.com/ (Log In ~ Skano, Password ~ Albany)
Click on Math then click on Probability!
Virtual rolling of a die ~ www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks1/maths/dice/index.htm
Virtual spinning of a color wheel ~ http://nlvm.usu.edu/en/nav/frames_asid_186_g_1_t_1.html
IXL (http://www.ixl.com/):
Search through the sixth & seventh grade sections for the Probability topic!
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