Answer: 0.9
Step-by-step explanation:
For any event A , the probability of event A will occur be P(A).
Then , the probability of not occuring the event A will be given by :-
\(\text{P(A')=1-P(A)}\)
The given statement : The probability that an event will occur is 0.1.
That is , \(P(A)=0.1\)
Now, the probability that the event will NOT occur is given by :-
\(\text{P(A')}=1-0.1\\\\\Rightarrow\ \text{P(A')}=0.9\)
Hence, the probability that the event will NOT occur = 0.9
