Okay, I have a 10-sided die. I'm looking for occurrences of 1's and 6's when I roll it.
On a single role, the chance that I'll get a 1 or a 6 is 20%.
I know that much.
But lets say I don't get it on the first roll. Or the first four?
Here's what I'm trying to figure out:
Probability says that if I roll a d10, there's a 1 in 5 chance that I'll get a 1 or a 6 as a result. If I keep rolling, I'm GOING to get a 1 or a 6 eventually.
What are the odds that it'll happen within the first four tries?
What are the odds that two of the results will be 1 or 6?
Three of the results?