If a fair dice is tossed 10 times - what is the probability of at least 2 6's?

What is the general 'formula', say I want at least 4 6's etc..

Thanks

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- Dec 17th 2008, 03:52 AMlorenzProbability - fair dice - at least 2 6's in 10 tosses
If a fair dice is tossed 10 times - what is the probability of at least 2 6's?

What is the general 'formula', say I want at least 4 6's etc..

Thanks - Dec 17th 2008, 03:56 AMmr fantastic
Let X be the random variable

*number of 6's*.

X ~ Binomial(n = 10, p = 1/6).

Calculate $\displaystyle \Pr(X \geq 2) = 1 - \Pr(X \leq 1) = 1 - \Pr(X = 0) - \Pr(X = 1)$.

Use the formula given here: Binomial Distribution (1 of 3) - Dec 17th 2008, 04:22 AMlorenz
Thank you very much