Geometric distribution  Discrete Probabilities
Geometric distribution
Lessons
Notes:
• $P(n)=(1p)^{n1}p$
$n$: number of trials until the first success
$p$: probability of success in each trial
$P(n)$: probability of getting your first success in the $n^{th}$ trial

3.
In the game Dungeons and Dragons a fair 20 sided die (icosahedra) is used. A "critical hit" is when a 20 is rolled.

4.
Geometric Calculator
Balls are drawn with replacement from an urn containing 9 black balls, and 1 golden ball.