Probabilites... lol.

So yeah.. can't figure out how this works lol.

"What are the probabilities that you get at least a 6 if you roll two times a 6-faced dice?"

Answer is 11/36 >.>

 

Is it six combined or a face with a 6?

 

Whatcha mean, look:

You roll a 6 faced-dice once.
You roll it again.

What are the probabilities that you get at least one 6?

 

I think it's. 1 in 36.

 

If you're rolling a dice twice, there are 36 different results you can get. This is found by multiplying 6 by 6. That is how you get the 36 in your denominator.

The chances of rolling a 6 with one dice is 1/6 and the chances of NOT rolling a 6 is 5/6.

Take the chances of NOT rolling a 6, 5/6, and multiply it by itself: (5/6)(5/6). You should get 25/36. Now, knowing that you have a 25/36 chances to NOT get a 6 you can find that you have an 11/36 chance of getting a 6.

(5/6)(5/6)= 25/36
(36/36)-(25/36) = 11/36

 

Thanks lol. I feel noob now. xD
Guess that's what happens when you wait till 11 to do homeworks.