You need to work out the probability of rolling a three 35 times in one way in a 100 rolls, and then find the probability of these 35 threes being distributed anywhere amongst the 100 rolls.
For the first part you might as well assume the first 35 rolls give a three and the remainder not a three.
for the second part multiply the result from the first part by the nCr of (100 35).
That's your result.
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Ray TurnerSenior ConsultantAuthor Commented:
What would the equation look like for this problem?
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http://en.wikipedia.org/wiki/Binomial_probability
The probability of getting exactly 35 threes in 100 rolls .....