BINOM.DIST(number_s, trials, probability_s, cumulative)

Returns the probability of getting less than or equal to a particular value in a binomial distribution.

number_sThe number of successes out of the trials.
trialsThe number of independent trials.
probability_sThe probability of a success on each trial.
cumulativeA logical value indicating the type of function to use:
True = cumulative probability function (less than)
False = probability mass function (equal to)

* Added in Excel 2010.
* This function replaces the BINOMDIST function.
* The binomial distribution is a discrete distribution.
* If "cumulative" = True, then the area under the curve to the left of "x" is returned. This uses the cumulative probability function.
* If "cumulative" = False, then the height of the bell shaped curve at "x" is returned. This uses the probability mass function.
* All the values are greater than zero.
* You can use the BINOM.INV function to return the probability of getting greater than a particular value in a binomial distribution.
* For the Microsoft documentation refer to

1=BINOM.DIST(1,6,0.5,FALSE) = 9.38%
2=BINOM.DIST(2,6,0.5,FALSE) = 23.44%
3=BINOM.DIST(3,6,0.5,FALSE) = 31.25%
4=BINOM.DIST(4,6,0.5,FALSE) = 23.44%
5=BINOM.DIST(5,6,0.5,FALSE) = 9.38%
6=BINOM.DIST(6,6,0.5,FALSE) = 1.56%
7=BINOM.DIST(1,6,0.5,TRUE) = 10.94%
8=BINOM.DIST(2,6,0.5,TRUE) = 34.38%
9=BINOM.DIST(3,6,0.5,TRUE) = 65.63%
10=BINOM.DIST(4,6,0.5,TRUE) = 89.06%
11=BINOM.DIST(5,6,0.5,TRUE) = 98.44%
12=BINOM.DIST(6,6,0.5,TRUE) = 100.00%
13=BINOM.DIST(6,10,-0.5,FALSE) = #NUM!
14=BINOM.DIST(6,"some text",0.5,FALSE) = #VALUE!

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