Unit 6 Probability Review Day!.

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Presentation transcript:

Unit 6 Probability Review Day!

Warm-up — Review Day! 1. There are 3 quarters, 7 dimes, 13 nickels, and 27 pennies in Jonah's piggy bank. If Jonah chooses 2 of the coins at random, what is the probability that the first coin chosen is a penny and the second coin chosen is a dime? The first coin is not replaced. 2. Given a standard deck of cards, find P(Ace of Spades  black card). 3. Suppose 60% of all teenagers like to watch horror movies. 28% of teenagers that watch horror movie, watch movies in the dark. 76% of teenagers that do not watch horror films, watch movies with the lights on. a) Create a tree diagram. b) What is the probability that a teenager watches movies with the lights on? c) Find P(Dark | Watches Horror Movies) d) What is the probability that they do not watch horror films, given that they watch movies in the dark?

Warm-up — Answers! There are 3 quarters, 7 dimes, 13 nickels, and 27 pennies in Jonah's piggy bank. If Jonah chooses 2 of the coins at random, what is the probability that the first coin chosen is a penny and the second coin chosen is a dime? The first coin is not replaced. 27/350 2. Given a standard deck of cards, find P(Ace of Spades  black card). 1/26

Warm-up — Review Day! Lights Dark 0.60 * 0.72 = 0.432 3. a 0.72 Horror No Horror Survey 0.60 0.60 * 0.28 = 0.168 0.28 Dark Lights 0.40 * 0.76 = 0.304 0.76 0.40 0.24 0.40 * 0.24 = 0.096 b) What is the probability that a teenager watches movies with the lights on? 73.6 % c) Find P(Dark | Watches Horror Movies) 28% d) What is the probability that they do not watch horror films, given that they watch movies in the dark? 36.4%

HW Answers p. 14-16 Evens p. 14-15 2) B 4) D 6) C 8) B 10) D 12) A 14) C p. 16 2) 9/20 4) 1/896 6) 126

On a sheet of paper, please create 3 columns: Probability Review On a sheet of paper, please create 3 columns: Problem Work Solution and Shape