Solution of problem N3415 probability theory

Solution of problem N3415 probability theory

3415. Of the 50 questions in the course, the student knows 25. At the exam, he is randomly asked three questions. What is the probability that a student will answer correctly: a) at least one question; b) all questions?

Additional information:

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)

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