Solution of problem N3420 probability theory

Solution of problem N3420 probability theory

3420. The student came to the exam, knowing only 20 of the 25 questions in the program. The examiner asked the student 3 questions. Using the concept of conditional probability to find the probability that a student knows all the questions. Find the same probability using the classical definition of probability.

Additional information:

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

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