When does the union of two events occur? A. Both event A and event B occur B. Either event A or event B occurs C. Event A and event B are mutually exclusive D. Neither event A and event B occur

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Chapter1: Combinatorial Analysis
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1. When does the union of two events occur?
A. Both event A and event B occur
B. Either event A or event B occurs
C. Event A and event B are mutually exclusive
D. Neither event A and event B occur
2. What do you call the collection of all outcomes that is an element of one or the other of the
sets A and B, or both of them?
A. Complement
B. Condition
C. Intersection
D. Union
3. In the formula for finding the probability of a union of two events:
P(AU B) = P(A) + P(B) – P(A N B), why is P(A N B) subtracted from
P(A) + P(B)?
A. P(A N B) has been counted twice through P(A) and P(B).
B. There is no explanation other than it's just a part of the rule.
C. This rule determines the probability of event A or B occurring, not A and B, so this
factor is subtracted.
D. Either A or C
Transcribed Image Text:1. When does the union of two events occur? A. Both event A and event B occur B. Either event A or event B occurs C. Event A and event B are mutually exclusive D. Neither event A and event B occur 2. What do you call the collection of all outcomes that is an element of one or the other of the sets A and B, or both of them? A. Complement B. Condition C. Intersection D. Union 3. In the formula for finding the probability of a union of two events: P(AU B) = P(A) + P(B) – P(A N B), why is P(A N B) subtracted from P(A) + P(B)? A. P(A N B) has been counted twice through P(A) and P(B). B. There is no explanation other than it's just a part of the rule. C. This rule determines the probability of event A or B occurring, not A and B, so this factor is subtracted. D. Either A or C
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