### BETADIST(x, alpha, beta [,A] [,B])

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

 x The number between A and B from the distribution. alpha The first parameter to the distribution. beta The second parameter to the distribution. A (Optional) The lower bound to the interval of x. B (Optional) The upper bound to the interval of x.

#### Remarks

 * BETA.DIST was added in Excel 2010 to replace this function.* The beta distribution is a continuous distribution..* This function only uses the cumulative probability function.* If any of the arguments are not numeric, then #VALUE! is returned.* If "alpha" = 0, then #NUM! is returned.* If "beta" = 0, then #NUM! is returned.* If "x" < "A", then #NUM! is returned.* If "x" > "B", then #NUM! is returned.* If "A" = "B", then #NUM! is returned.* If "A" is left blank, then A = 0.* If "B" is left blank, then #NUM! is returned.* In Excel 2010 the accuracy of this function was improved.* For the Microsoft documentation refer to support.office.com