CHAPTER 3 MATH 110| PORTAGE LEARNING

CHAPTER 3 MATH 110| PORTAGE
LEARNING

, Chapter 3 math 110
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).




P(B∁)=> P(B)=1-P(B∁)
P(B)=1-0.45=0.55



Instructor Comments
Very good.
Answer Key
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).



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