please help
What is the probability that either event will occur?
15
A
12
B
18
21
P(A or B) = P(A) + P(B) - P(A and B)
P(A or B) = [?]
Enter as a decimal rounded to the nearest hundredth.
![please help What is the probability that either event will occur? 15 A 12 B 18 21 P(A or B) = P(A) + P(B) - P(A and B) P(A or B) = [?] Enter as a decimal rounde class=](https://us-static.z-dn.net/files/d52/23453745249922e46cef94e10515d7fb.png)