Answer: \(\text{P(not 1)}=0.70\)
Step-by-step explanation:
The given table :
X 1 2 3 4
P(X) 0.30 0.40 0.15 0.15
From the above table we can see that \(\text{P(1)}=0.30\)
Also we know that the probability of complement of any event A is given by :-
\(\text{P(not A)}=1-P(A)\)
Therefore,
\(\text{P(not 1)}=1-\text{P(1)}\\\\\Rightarrow\ \text{P(not 1)}=1-0.30\\\\\Rightarrow\ \text{P(not 1)}=0.70\)
