New to this stuff, sample problem

[snoopdawg]

I've been recently reading about this, and I think this is ok.
"Pick a number. Roll a die 3 times. How often will that number come up in at least 1 roll?"

This is what i got:
5/6 x 5/6 x 1/6 = 25/216 (x3) = 75/216 plus
5/6 x 1/6 x 1/6 = 5/216 (x3) = 15/216 plus
1/6 x 1/6 x 1/6 = 1/216 (x1) = 1/216 equals
91/216, or 42.1%

Right?

[Silent A]

roll 3 dice, what are the odds that none of them are a 6?

(5/6)*(5/6)*(5/6) = 125/216

what are the odds that at least one of them is a 6?

1 - 125/216 = 91/216

you are right