A fair coin is tossed 5 times. What is the probability of obtaining exactly 2 heads if it is known that at least 1 head appeared?

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- Nov 12th 2011, 08:31 PMmtingtBinomial conditional probability.
A fair coin is tossed 5 times. What is the probability of obtaining exactly 2 heads if it is known that at least 1 head appeared?

- Nov 12th 2011, 08:41 PMTKHunnyRe: binomial probability help please
What is the probability of exactly one (1) "heads" in four tosses? Are you sure it's trickier than that? If so, why?

- Nov 12th 2011, 08:44 PMmtingtRe: binomial probability help please
what do you mean?

- Nov 13th 2011, 10:49 AMmr fantasticRe: Binomial conditional probability.