Given:
A number cube is rolled.
Required: Probability of not getting an even number
Step-by-step explanation:
Let S be the sample space and E be the event "Not getting an even number". Then
S = {1, 2, 3, 4, 5, 6} and E = {1, 3, 5}
The required probability is

Option a is correct.
Final Answer: Probability of not getting an even number is 1/2.