Question

Mrs. Brown decides to change her experiment. This time, she plans to roll the die until she gets a three. She wants to know the probability of getting her first three on her 5th roll.

  Explain why this is an example of a geometric experiment

Define the variables for finding the geometric probability distribution. 
P = probability of success (rolling a three) =
n = number of events until success = 

Answer 1

that is the same as
P(~3,~3,~3,~3,3) = (5/6)^4 * (1/6)^1

Answer 2

Mrs. Brown decides to change her experiment. This time, she plans to roll the die until she gets a three. She wants to know the probability of getting her first three on her 5th roll.

Explain why this is an example of a geometric experiment