The setting appears to be binomial. Therefore, sum the binomial probability theorem (where n is the number of trials, k is the number of successes, and p is the probability of success) for k = 3, k = 4, ..., k = 9, and k = 10, or .

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- February 18th 2010, 05:31 PM #1

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- February 18th 2010, 06:26 PM #2

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