The complement of an event is all possible outcomes not in the event.  For example: If A = at least 3 girls are born to a family with 6 kids.  Then A' =  A compliment is what happens if there are not at least 3 girls = less than 3 girls born to the family.  A useful formula: P(A) + P(A' ) = 1 or P(A') = 1 - P(A).  If P(A) = 0.194, what is P(A')?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.2: Introduction To Probability
Problem 79E
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The complement of an event is all possible outcomes not in the event. 

For example: If A = at least 3 girls are born to a family with 6 kids. 

Then A' =  A compliment is what happens if there are not at least 3 girls = less than 3 girls born to the family. 

A useful formula: P(A) + P(A' ) = 1 or P(A') = 1 - P(A). 

If P(A) = 0.194, what is P(A')?

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