Answer:
1/16
Step-by-step explanation:
+ Dice2
Dice1 1 2 3 4 5 6
1 2 3 4 5 6 7
2 3 4 5 6 7 8
3 4 5 6 7 8 9
4 5 6 7 8 9 10
5 6 7 8 9 10 11
6 7 8 9 10 11 12
Probability = number of desired outcome / total number of outcome
= 4 / 36
= 1/9
The probability of rolling a 9 the first time is therefore = 1/4
The probability of rolling a 9 twice in a row is just the product of the probability for two independent rolls each producing a 9.
That is, 1/4 * 1/4 = 1/16 = 0.0625.
