When you roll a 6 sided die, you can get one of 6 outcomes: 1, 2, 3, 4, 5, or 6.
The odds of getting a 4 is one possibility out of 6, or 1/6.
The possibility of not getting a 4 is five possibilities out of 6, or 5/6.
The odds against showing a 4 is 5/6.
Hope this helps!
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