RANDNEGBINOM

RANDNEGBINOM —

RANDNEGBINOM(p,failures)

RANDNEGBINOM returns a negative binomially-distributed random number.

If p < 0 or p > 1, RANDNEGBINOM returns #NUM! error.
If failures < 1, RANDNEGBINOM returns #NUM! error.

RANDNEGBINOM(0.5,2).

RAND, RANDBETWEEN.