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posted by Chrissy .
P(A)=0.40
P(B)=0.25
The probability of both events occurring is 0.15. What is the probability of either event occurring?
A. 0.15
B. 0.50
C. 0.65
D. 0.80
Is it D?

Help Math 
TutorCat
incorrect.
Law of addition:
P(A or B) = P(A)+ P(B) P(A and B)
source:
http://www.quickmba.com/stats/probability/ 
Help Math 
Chrissy
I got b now thank you
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