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Ashok Kumar
Ashok Kumar, Electrical Engineer
Category: Math Homework
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Experience:  Master's Degree
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If P(A)=0.50, P()=0.40, and P(AuB)=0.88, then P(/A)=

Customer Question

If P(A)=0.50, P(B)=0.40, and P(AuB)=0.88, then P(B/A)=
Submitted: 2 years ago.
Category: Math Homework
Expert:  Ashok Kumar replied 2 years ago.
I am working and will reply shortly.
Customer: replied 2 years ago.
Thank you, Ashok. Would you please explain so I can try to answer other questions using your example? Thank you!
Expert:  Ashok Kumar replied 2 years ago.
P(A U B) = P(A) + P(B) - P(A ∩ B)
0.88 = 0.5+0.4- P(A ∩ B)
Or, P(A ∩ B)= 0.5+0.4 - 0.88 = 0.02
P(B/A) = P(A ∩ B)/P(A)
= 0.02/0.5
= 0.04
Kindly let me know for any clarification.
Kindly rate the answer.
Customer: replied 2 years ago.
So, you treat it like an equation in Algebra, basically, adding a negative to the other side to balance out the probability?
Expert:  Ashok Kumar replied 2 years ago.
Actually it is conditional probability problem. We have find out P(A∩B)to determine P(B/A) and this is what I have done.
Expert:  Ashok Kumar replied 2 years ago.
Kindly rate the answer if no further clarification is needed.

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