Question 1204199
A standard die has 6 possible outcomes  (1, 2, 3, 4, 5,6)

Prime numbers on the face of die are 2, 3, 5. 
 1 is also a possible outcome. There are four favorable outcomes: 1, 2, 3, and 5.


Probability = (Number of Favorable Outcomes) / (Total Number of Possible Outcomes)

Probability = 4  / 6  = 2/3

 Probability of rolling a 1 or a prime number on a standard  die is 2/3,