SOLUTION: In a single spin, what is the probability of obtaining a C given the spinner did not land on a B? P(A): 2/5 P(B): 1/5 P(C): 1/10 P(D): 3/10

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Question 505553: In a single spin, what is the probability of obtaining a C given the spinner did not land on a B?
P(A): 2/5
P(B): 1/5
P(C): 1/10
P(D): 3/10
Found 2 solutions by edjones, Edwin McCravy:
Answer by edjones(8007)   (Show Source): You can put this solution on YOUR website!
what letters are on the spinner?
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
The other tutor misunderstood that A,B,C, and D are the
letters on the spinner.

The conditional probability of X given Y is given by the formula:

          P(X and Y)
P(X|Y) = ------------
             P(Y) 


              P(C and not B)
P(C|not B) = --------------- 
                P(not B)

P(C and not B) = P(C) = 

P(not B) = 1 - P(B) = 1 -  =  -  = 


              P(C and not B)      
P(C|not B) = --------------- =  -------- =   =  = 
                P(not B)           


Edwin
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