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Mathematics 17 Online
OpenStudy (anonymous):

A certain quiz had 6 questions which were selected randomly from a pool of 20 possible questions. A student could take the test 3 times. What is the probability that the student would see repeat questions on the second attempt? What about on the third attempt? What effect would it have if the question pool were increased to from 20 to 30? can i see the work for this?

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