SOLUTION: X Y Tot A 24 31 55 B 13 66 79 Tot 37 97 134 Is P(X or A) = 68/134? and Is P(X|A) = 24/55?

Algebra ->  Probability-and-statistics -> SOLUTION: X Y Tot A 24 31 55 B 13 66 79 Tot 37 97 134 Is P(X or A) = 68/134? and Is P(X|A) = 24/55?       Log On


   

Question 928579: X Y Tot
A 24 31 55
B 13 66 79
Tot 37 97 134
Is P(X or A) = 68/134?
and
Is P(X|A) = 24/55?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
X Y Tot
A 24 31 55
B 13 66 79
Tot 37 97 134
Is P(X or A) = (37 + 55 - 24)/134 = 68/134?
and
Is P(X|A) = P(X and A)/P(A) = 24/55?
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Both are correct.
Cheers,
Stan H.
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