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| revprev | Admin | Jun 26'24 at 1:38 | +95 | ||
| revcur | Admin | (Created page with "Exactly one of six similar keys opens a certain door. If you try the keys, one after another, what is the expected number of keys that you will have to try before success? '''References''' {{cite web |url=https://math.dartmouth.edu/~prob/prob/prob.pdf |title=Grinstead and Snell’s Introduction to Probability |last=Doyle |first=Peter G.|date=2006 |access-date=June 6, 2024}}") | Jun 24'24 at 19:18 | +379 |