Binomial distribution conditions

  1. Each trial has 2 outcomes - success & failure

  2. there’s a fixed number of trials

  3. trials are all independent to each other

  4. probabilities are the same for the trial ⇒ P(success) = 1-P(failure)

Geometric distribution

  1. each trial has 2 outcomes — success & failure

  2. all trials are independent to each other

  3. probabilities are the same for each trial = P(success) = 1-P(F)

4) variable of interest - number of trials required to obtain the first success