# Pass a test

The student has to pass a test that contains ten questions. For each of them, he chooses one of 5 answers, with just one being correct. The student did not prepare for the test, so he randomly chose the answers. What are the probabilities that the student will answer correctly:

a) a maximum of 3 questions

b) at least 4 questions

c) all ten questions

a) a maximum of 3 questions

b) at least 4 questions

c) all ten questions

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