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avatar+427 

A and B are two events.

Let P(A)=0.5 , P(B)=0.4 , and P(A and B)=0.2 .

Which statement is true?

A and B are independent events because P(A|B)=P(B|A) .

A and B are independent events because P(A|B)=P(A) .

A and B are not independent events because P(A|B)=P(B|A) .

A and B are independent events because P(A|B)=P(B) and P(B|A)=P(A) .

 Dec 19, 2018
 #1
avatar+94277 
+1

P(A l B  )   = P (A and B) / P(B) =     0.2 / 0.4  =   0.5

 

Independent because    P(A l B) = P(A)

 

 

cool cool cool

 Dec 19, 2018

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