StatTutor Lesson - Introduction to Chapter 12: General Rules of Probability

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Chapter 12 Introduction
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      Question 1.

      Let’s review some basics of probability. A bag of Skittles has 9 reds, 10 oranges, 7 yellows, 8 purples, and 6 greens. What is the probability of a red skittle if one is selected at random?
      Correct. There are a total of 9 + 10 + 7 + 8 + 6 = 40 candies, 9 of which are red, so the probability of a red one is 9/40.
      Incorrect. There are a total of 9 + 10 + 7 + 8 + 6 = 40 candies, 9 of which are red, so the probability of a red one is 9/40.
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