HYPGEOMDIST(x,n,M,N[,cumulative])
HYPGEOMDIST function returns the hypergeometric distribution. x is the number of successes in the sample, n is the number of trials, M is the number of successes overall, and N is the population size.
If the optional argument cumulative is TRUE, the cumulative left tail will be returned.
HYPGEOMDIST(1,2,3,10) equals 0.4666667.