Table of Contents Probability Objective: Use probability to solve application problems Introduction What will probably happen? Learn how to predict events in this lesson. Directions: Before you begin, view the video and the presentation on Probability. Introduction Probability = \large \frac{total}{total}\frac{ways}{number}\frac{a}{of}\frac{specific}{possible}\frac{outcome}{outcomes}\frac{will}{}\frac{happen}{} Example There are 87 marbles in a bag and 68 of them are green. If one marble is chosen, what is the probability that it will be green? Probability = specific: green (68) total: all (87) = 68 ÷ 87 = 0.781609... Watch the instructions carefully to determine how many decimals places to round, or if the number should be converted to a percent. In the example above, if we round to two decimal places, we get 0.78. Review Directions: Use the Spinner to answer questions 1-6. 1) In which color, is the pointer more likely to land? 2) In which color, is the pointer less likely to land? 3) In which colors, is the pointer equally likely to land? 4) What is the chance the pointer will land on white? a) More likely b) less likely c) equally likely d) unlikely 5) Is any color certain? 6) If green is replaced by blue, which colors have equally likely chances? 7) There are 5 white balls, 8 red balls, 7 yellow balls, and 4 green balls in a container. A ball is chosen at random. What is the probability of choosing red? 8) What is the probability of choosing green? 9) What is the probability of choosing either red or white? 10) What is the probability of choosing neither white nor green? 11) What is the probability of choosing other than yellow? 12) What is the probability of choosing black? 13) A card is drawn from a deck of 52 cards. Find the probability of drawing a black card. 14) Find the probability of drawing a red card. 15) Find the probability of drawing a red or black. 16) Find the probability of drawing an ace. 17) Find the probability of drawing either a jack or queen or king.