Question: Let's say the prof. decided to ask, until at least 2 students said No OR at least 2 students said Yes. On average, how many

Let's say the prof. decided to ask, until at least 2 students said "No" OR at least 2 students said "Yes". On average, how many students would the Professor expect to have to ask to get at least two "Yes'" or at least two "No's

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