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Easy

Question

What is A union B for two mutually exclusive sets A and B?

  1. n (A) + n (B)
  2. n (A) – n (B)    
  3. n (B) – n (A)    
  4. n left parenthesis A right parenthesis space cross times n left parenthesis B right parenthesis    

hintHint:

Mutually exclusive events are those events that do not occur at the same time

The correct answer is: n (B) – n (A)


    n open parentheses A close parentheses plus n open parentheses B close parentheses

    .Mutually exclusive events are also called disjoint events.

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