Geometric or Poisson

Drought length is referred to as the number of consecutive time intervals in which the water supply remains below a critical value. Consider the drought length as a random variable, denoted as Y, which is assumed to have a geometric distribution with $p=0.409$

1. What is the probability that a drought lasts exactly 3 intervals? (0.0844)

2. What is the probability that a drought lasts at most 3 intervals? (0.878)

Drought length is referred to as the number of consecutive time intervals in which the water supply remains below a critical value. Consider the drought length as a random variable, denoted as Y, which is assumed to have a geometric distribution with $p=0.409$

1. What is the probability that a drought lasts exactly 3 intervals? (0.0844)

2. What is the probability that a drought lasts at most 3 intervals? (0.878)