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Home > A2C > Chapter 11 > Lesson 11.2.1 > Problem 11-42

11-42.
  1. Your midterm exam contains 12 questions and you must answer any 10. Homework Help ✎

    1. How many different combinations of questions are possible?

    2. If everyone must answer questions one, two and three, how many different combinations are possible?

12C10 = 66

9C7 = 36