Question 855527
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Hi,
	POP	smoker	% of total P
A	0.2	0.4	0.08
B	0.3	0.2	0.06
C	0.5	0.3	0.15
			0.29
P(smoker) = .2*.4 + .2*.3 + .3*50 = .08 + .06 + .15 = .29
P(A|smoker) = .08