BINOM.INV function
Returns the smallest value for which the cumulative binomial distribution is greater than or equal to a criterion value.
Syntax
BINOM.INV(trials,probability_s,alpha)
The BINOM.INV function syntax has the following arguments:

Trials Required. The number of Bernoulli trials.

Probability_s Required. The probability of a success on each trial.

Alpha Required. The criterion value.
Remarks

If any argument is nonnumeric, BINOM.INV returns the #VALUE! error value.

If trials is not an integer, it is truncated.

If trials < 0, BINOM.INV returns the #NUM! error value.

If probability_s is < 0 or probability_s > 1, BINOM.INV returns the #NUM! error value.

If alpha < 0 or alpha > 1, BINOM.INV returns the #NUM! error value.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How do I copy an example?

Select the example in this article.
Important Do not select the row or column headers.
Selecting an example from Help

Press CTRL+C.

In Excel, create a blank workbook or worksheet.

In the worksheet, select cell A1, and press CTRL+V.
Important For the example to work properly, you must paste it into cell A1 of the worksheet.

To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
After you copy the example to a blank worksheet, you can adapt it to suit your needs.

