[10 5] An instructor gave her students 12 problems,

Chapter 0, Problem SE.19

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[10 5] An instructor gave her students 12 problems, telling them that 3 of the problems will be on a quiz and that passing the quiz requires solving all 3 of the problems. a. Given that the instructor chooses the 3 problems at random, what is the probability for a student who knows only 10 problems to pass? b. What are the chances to fail for a student who knows only 8 problems?

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