1. The problem statement, all variables and given/known data
How many times must I throw a fair dice in order to make the probability of getting at least one ‘6’ greater than 90%?
With this many throws, what is the probability of getting three ‘6’s?
It’s the first part I’m struggling with.
2. Relevant equations
The relevant question is the one on the top of the pic attached.
P = probability of outcome interested in
N = number of throws
3. The attempt at a solution
I’m using P(1) as the probability of getting 1 six, so n=1.
For the second part of the equation I would use P(3).