The Probability of an Event $A \text { or } B ( \operatorname { Pr } ( A \text { or } B ) )$

question 21

Multiple Choice

The probability of an event $A \text { or } B ( \operatorname { Pr } ( A \text { or } B ) )$
to occur equals

• A) \(\operatorname { Pr } ( A ) \times \operatorname { Pr } ( B )\)
• B) \(\operatorname { Pr } ( A ) + \operatorname { Pr } ( B ) \text { if } A \text { and } B \text { are mutually exclusive. }\)
• C) \(\frac { \operatorname { Pr } ( A ) } { \operatorname { Pr } ( B ) }\)
• D) \(\operatorname { Pr } ( A ) + \operatorname { Pr } ( B ) \text { even if } A \text { and } B \text { are not mutually exclusive. }\)

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