if so how many sides does this cube have? 6
how many 5's are on this cube? 1
put the number os sides under the number of 5's and you get
1
6
The probability of ROLLING a 5 is=1/6
The probability of NOT rolling a 5 is=1 -1/6=5/6
do you have some sort of text book? maybe that could help because I don't think I've reached that far yet.