two number cubes are rolled 3 times in a row. what is the probability of rolling a sum of 9 all three times?

1/216 or 1:216 or about. 5%

Step-by-step explanation:

Each roll has a 1/6th chance of being a nine. Roll the dice three times, and you get

1/6 * 1/6 * 1/6

simplify it down to

1/36 * 1/6

solve to get the answer of

1/216