Answer:
B. 0.813
Explanation:
A sixteen-sided number cube has the numbers 1 through 16 on each face.
So,

Let us assume that, A be the event that the number will be an even number. So,
and

Then,

Let us assume that, B be the event that the number will be an odd prime number.
and

Then,

So the probability that you will roll an even number or an odd prime number will be,

( as independent events)

