Answer:
probability: 4/6 = ~66.67%
simplified: 2/3
Explanation:
Prime numbers are numbers that cannot be factored into smaller natural numbers (whole numbers).
In a ordinary cube, there are 6 sides, numbered 1 - 6. Find the factors of each number:
1: 1
2: 1 ,2
3: 1 , 3
4: 1 , 2 , 4
5: 1 , 5
6: 1 , 2 , 3 , 6
If there is any number with only 1 and the number itself, then it is a prime number. In this case, it will be 1, 2, 3, 5, or 4 sides in all.
4/6 is your probability of rolling a prime number for a fair dice.
Most likely, you will need to simplify. Divide 2 from both numerator & denominator:
(4/6)/(2/2) = 2/3
2/3 is your simplified answer.