tf.contrib.distributions.Binomial.mode()

tf.contrib.distributions.Binomial.mode(name='mode')

Mode.

Additional documentation from Binomial:

Note that when (n + 1) * p is an integer, there are actually two modes. Namely, (n + 1) * p and (n + 1) * p - 1 are both modes. Here we return only the larger of the two modes.