Question 131298This question is from textbook Prealgebra and Introductory Algebra
: Given a pair of dice, what is the probability of the event of rolling a sum of 12 on one roll of the dice? formula P( E )= n/s
This question is from textbook Prealgebra and Introductory Algebra
Answer by josmiceli(19441)   (Show Source):
You can put this solution on YOUR website! To think about it, just roll one die. How many different
ways can it come up? You can get 1,2,3,4,5, or 6 , so
6 different ways. Suppose it comes up 3. Now roll the 2nd die.
It can come up 6 different ways also, so there are 6 ways that
the 2nd die can combine with the 3 on the 1st die. Now add up
all the possibilities
1st -- 2nd
-------------
1 ---- 6 ways
2 ---- 6 ways
3 ---- 6 ways
4 ---- 6 ways
5 ---- 6 ways
6 ---- 6 ways
-------------
total 36 ways
So, there are 36 ways to roll 2 dice. Some look the same, but they
are different, like 3 and 4 on 1st roll, 4 and 3 on 2nd roll
How many ways can you get 12 with 2 dice?
There is only 1 way, 6 and 6, so the probability of
rolling a 12 is 
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