Hi LuckyDucky!
I'm probably wrong too, but I'll give this problem a shot too :)
So I basically did the same thing as the Guest who answered your question, but I think the answer is actually \(\boxed{\frac{4}{15}}\)because the questions says "you are told that the sum of the two rolls is a prime" the answer is actually 4 out of the prime sums, and there are 15 possible prime sums. (The Guest made the mistake of making it out of all 36 possible sums)
So, I think the answer is \(\boxed{\frac{4}{15}}\)
I'm probably wrong, but I hope this helped you anyway
:)
+738 