Calculates probabilities for a binomial distribution.

BINOMDIST(k, n, p, mode)

With n independent trials, each with a probability p of success, BINOMDIST returns the probability that the number of successes will be

exactly k if mode is 0.

up to (and including) k if mode is 1.

In other words, BINOMDIST returns the probability mass function if mode is 0, and the cumulative probability function if mode is 1.

BINOMDIST(k, n, p, 1) is equivalent to B(n, p, 0, k).

BINOMDIST(3, 12, 0.5, 0)

returns approximately 0.05 (5%), the probability that heads will come up exactly 3 times in 12 flips of a coin.

BINOMDIST(3, 12, 0.5, 1)

returns approximately 0.07 (7%), the probability that heads will come up 0, 1, 2 or 3 times in 12 flips of a coin.

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