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A fair n (n > 1) faces die is rolled repeatedly until a number less than n appears. If the mean of the number of tosses required is n/9, then n is equal to ____________.
Correct answer is '10'. Can you explain this answer?
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A fair n (n > 1)faces die is rolled repeatedly until a number less ...
In this case, the success is defined as getting a number less than n when rolling an n-sided die. The probability of success, p, in each roll is then (n - 1)/n, and the probability of failure, q = 1 - p, is 1/n

where
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A fair n (n > 1)faces die is rolled repeatedly until a number less ...
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A fair n (n > 1)faces die is rolled repeatedly until a number less than nappears. If the mean of the number of tosses required is n/9,then n is equal to ____________.Correct answer is '10'. Can you explain this answer?
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