Answer:5555555555555555555
Step-by-step explanation:
A U B = {1, 2, 3, 4, 5, 6, 7}
A = {1, 2, 5, 7} and B = {3, 4, 6, 7}
6 numbers per cube
if one is a 1, then the other one has to be a 2, 4 or 6 to be an odd sum
1+2=3, 1+4=5,1+6=7
since there are 3 numbers you can get that would be a 3/6 ( reduce to 1/2) probability
so 1/2 probability