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Exam (elaborations)
CHAPTER 3 MATH 110| PORTAGE LEARNING
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---8May 20222021/2022A
- Exam Page 1 
Suppose A and B are two events with probabilities: 
 
 
 
P(A)=.35,P(Bc )=.45,P(A∩B)=.25. 
 
Find the following: 
a)	P(A∪B). 
 
P (AUB)=P(AP+P (B)-P(A⋂B) 
P(B∁) => P(B)=1-P(b∁)=1-0.45=0.55 P(AUB)=0.35+0.55-0.25=0.65 
 
b)	P(Ac ). 
 
P(A∁)=> P(A)=1-P(A∁ )=> 
P(A∁)=1-P(A)=1-0.35=0.65 
 
c)	P(B).
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