Excel BINOM.DIST() function

Description

The BINOM.DIST() function is used to getg the individual term binomial distribution probability.

Use BINOM.DIST in problems with a fixed number of tests or trials, when the outcomes of any trial are only success or failure, when trials are independent, and when the probability of success is constant throughout the experiment.

For example, BINOM.DIST can calculate the probability that two of the next three babies born are male.

Version: Excel 2013

Syntax

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

Parameters

Name Description Data Type Required/
Optional
Number_s The number of successes in trials. number Required
Trials The number of independent trials. number Required
Probability_s The probability of success on each trial. number Required
Cumulative

A logical value that determines the form of the function.
If cumulative is TRUE, then BINOM.DIST returns the cumulative distribution function, which is the probability that there are at most number_s successes;
if FALSE, it returns the probability mass function, which is the probability that there are number_s successes.

boolean Required

Remarks :

  • Number_s and trials are truncated to integers.
  • If number_s, trials, or probability_s is nonnumeric, BINOM.DIST returns the #VALUE! error value.
  • If number_s < 0 or number_s > trials, BINOM.DIST returns the #NUM! error value.
  • If probability_s < 0 or probability_s > 1, BINOM.DIST returns the #NUM! error value.
  • The binomial probability mass function is :

    binom1

    where :

    excel binom 2

    is COMBIN(n,x).

    The cumulative binomial distribution is :

    excel binom3

Example : Excel BINOM.DIST() function

In the following worksheet probability of exactly 3 of 7 trials being successful.

Sample Data Description
3 Number of successes in trials
7 Number of independent trials
0.3 Probability of success on each trial

excel binom dot dist

 Source:http://www.w3resource.com/excel/excel-binom-dot-dist-function.php