Lori does some math.

[N35t0r]

I think what he's referring to is cumulative probability. You can 'add' (integrate) a normal distribution if you want to find out probabilities under or over a value (in fact, this is what you do, since the probability of a particular discrete value is 0).

[Lonestar]

I read the title as "Lori does some Meth" which I thought "that would explain her insane actions in The Walking Dead"

[Wezil]

I was so glad to see her go. [/threadjack]

[Lorizael]

The chance of rolling a 6 if you roll 3 dice is 1/6 each time, but the probability that one of 3 dice will roll a 6 isn't 1/2

Which is why I talked about a single event. The probability of rolling exactly one 6 on 3d6 is 3!/(1!2!) * 1/6 * (5/6)^2 = .347.