Texas Instruments TI-83 PLUS - Manual (Page 99)

TI-83 Plus Math, Angle, and Test Operations 96
randBin(
randBin( (random Binomial) generates and displays a random integer
from a specified Binomial distribution. numtrials (number of trials) must be
‚ 1. prob (probability of success) must be ‚ 0 and  1. To generate a list
of random numbers, specify an integer > 1 for numsimulations (number of
simulations); if not specified, the default is 1.
randBin( numtrials , prob [ , numsimulations ] )
Note: The seed value stored to rand also affects randInt( , randNorm( , and randBin(
instructions.