Question

Suppose we roll a fair six-sided die and sum the values obtained on each roll, stopping once our sum exceeds 376. Approximate the probability that at least 100 rolls are needed to get this sum.

Probability =

Answer #1

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if we need atleast 100 rolls to make sum exceeds 376 ..this means that 99 rolls make sum less than 376 ...we use this to find probability..

And here value of n is large , so we approximate this by normal distribution

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