I am reading some documentation which looks like:

p(0) = P(0 successes in n trials) = (1-p)n {FFFFFFF}
p(1) = P(1 success in n trials) = (n 1)p(1-p)n-1 {FSFFFFF}
p(2) = P(2 successes in n trials) = (n 2)p2(1-p)n-2 {FSFSFFF}

how do I interpret the parts that look like (n 1) and (n 2). I'm guessing you do not multiply it


1 Answer 1


It's the binomial coefficient $\tbinom nk$, read as n-choose-k:



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