If you roll five dice your chances of getting all five matching is .
I recently learned the binomial probability formula: .
- << The different possible combinations
- r is the number of dice you need to match
- n is the number of dice you're rolling
I use in the formula because that's dice probability
Because I am rolling 5 dice and need 5 matches, I set and and came up with this equation:
But when I set , with the formula below I do get the desired result.
Why is this? Shouldn't r and n be 5 because I'm rolling 5 dice and need 5 matches?