The list of possible outcomes in the question is totally incomprehensible. But from our vast experience with questions like this and dice in general, we know there are 36 of them.
Now, here are all the ways to roll a total of 9:
3, 6 6, 3 4, 5 5, 4
Four of the 36 possible rolls result in a 9. So the probability (with honest dice) is 4/36 = 1/9 = 11.1% .
(a) The terms of the sequence do not have a common difference, but they do have a common ratio. That ratio is 14/7 = 2. The general term of a geometric sequence with first term a1 and common ratio r is ...
