A Bernoulli trial is an experiment in which 
trials are made of an event, with
probability 
of success in any given trial.
Bernoulli Trial
See also
Bernoulli Distribution, Coin Tossing, RunExplore with Wolfram|Alpha
References
Papoulis, A. "Bernoulli Trials." §3-2 in Probability, Random Variables, and Stochastic Processes, 2nd ed. New York: McGraw-Hill, pp. 57-63, 1984.Referenced on Wolfram|Alpha
Bernoulli TrialCite this as:
Weisstein, Eric W. "Bernoulli Trial." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/BernoulliTrial.html