__Description:__

A **Monte Carlo**
simulation of a pumping network. There are five pumping stations whose
probability

of being operational is 1/2. We estimate
the probability that water will flow from A to B by randomly

generating a string of 5 entries that
are either 0 or 1. A 1 indicates that the pump is operational.

Water will flow from A to B if and only
if the randomly generated string of 0s and 1s have the following

pairs of pumps assigned a 1:

1 & 3, 1 & 4, 2 & 3, 4 & 5

__INPUT: __Number of trials to use
(default is 500)

__OUTPUT:__ Number of trials used &
an estimate of the probabilty of the water flowing from A to B.