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A standard die has 6 side and the theoretical probability of landing on any one of...

A standard die has 6 side and the theoretical probability of landing on any one of these in a single roll of the die is 1/6. On average then, how many times would I have to roll the die in order to be certain of landing on a 5? Estimate this over 2000 "rolls" of the die. How do I go about showing this using an excel spreadsheet?

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