Question

suppose you roll two dice. find the probability of rolling a sum of 9.

Answer 1

we need to count how many ways you can get a total of 9 on two dice
it is not that many, so we can list all of them

Answer 2

\[(4,5), (5,4), (6,3),(3,6)\] are the possible combinations that get a total of 9

Answer 3

so it would be 4?

Answer 4

nope, not quite, that is the numerator of our fraction

Answer 5

there are 4 ways to get a 9, and \(6\times 6=36\) possible rolls all together

Answer 6

the probability of getting the 9 is therefore
\[\frac{4}{36}\] which you can reduce if you like

Answer 7

i can see if i can find you a table with all the rolls filled in, then these are pretty easy

Answer 8

not filled in but you can fill it in yourself
just add up to get each entry in the 6 by 6 table

Answer 9

it said the answer was wrong, but it didn't give an explanation as to why.

Answer 10

maybe it wanted it reduced to \(\frac{1}{9}\) ?

Answer 11

did you put in 4/36?