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12 questions from this quiz
They cannot occur simultaneously
P(A or B)=P(A)+P(B)P(A \text{ or } B) = P(A) + P(B)P(A or B)=P(A)+P(B)
The OR rule
57\frac{5}{7}75
To avoid counting overlaps twice
P(A or B)=P(A)+P(B)−P(A and B)P(A \text{ or } B) = P(A) + P(B) - P(A \text{ and } B)P(A or B)=P(A)+P(B)−P(A and B)
Yes, 3 is odd so cannot be even
No, 6 is both even and > 4
No, 2 is both prime and even
Can these events happen simultaneously?
1430\frac{14}{30}3014
Double counting the intersection
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