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=

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