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valnadam
02-07-2011, 07:59 PM
A man rolls an ordinary die 6 times. What is the probability that he gets at least 5 threes? Round your answer to four decimal places.I'm new at Statistics and don't know where to start with this problem. Thanks

pka
02-07-2011, 08:35 PM
A man rolls an ordinary die 6 times. What is the probability that he gets at least 5 threes? Round your answer to four decimal places.I'm new at Statistics and don't know where to start with this problem. Thanks
That means either five threes or six threes.
\binom{6}{5}\left(\frac{1}{6}\right)^5\left(\frac{ 1}{6}\right)+\left(\frac{1}{6}\right)^6

valnadam
02-07-2011, 08:43 PM
So do i put all thoses numers together? Looks like I have to multiply then add

valnadam
02-08-2011, 05:41 AM
I got 0.0001500