The missing number would be 4/6, or 2/3.
The missing number can be found by finding the absolute distance in between the numbers, dividing it and then adding it to the smaller number.
(5/6-3/6)/2=(2/6)/2=1/6
3/6+1/6=4/6 or 2/3
4/12 will grow green tomatoes
1/18.
.
P = p1 x p2 = 1/6 × 2/6 = 1/18
.
Prob of getting 3 is 1/6, and prob of getting different odd number ie 1 or 5 is 2/6.