Answer:
Option C.
is the correct option.
Explanation:
In the given question numbers marked on a spinner are given = 8
Out of these numbers marked on spinner number of vowels are = 3
Therefore the sample set n(S) is = 8
and the favorable events are n(E) = 3.
As per rules of the probability, the probability of spinning the spinner and landing on vowel will be =

Now probability of spinning the spinner and not landing on a vowel will be
P(E)' =

Option C.
is the answer.