Find the location of B, the midpoint of AC. A
C С

+++ ++
-12-11-10 -9 -8 -7 -6 -5 4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12
Location of B:0
Х
6
?

The sum of P(A) and P(B) is not equal to P(A or B).

Step-by-step explanation:

We have that:

The probability for event A is 0.3, P(A)=0.3

The probability for event B is 0.6  P(B)=0.6 and  

The probability of events A or B is 0.8, P(A or B)=0.9

For mutually exclusive events,

Let us check and see if this is true

......This is not true

Therefore events A and B are not mutually exclusive because the sum of P(A) and P(B) is not equal to P(A or B).