Question 549771
in a certain department 40% of the students have internet facility 
25% have printing facility and 
15% have internet and printing facility 
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A student is selected at random from this department 
(i)if he has internet what is the probabilty that he also has printing facility ?
P(p | i) = P(p AND i)/P(i) = 0.15/0.4 = 0.375
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(ii) if he has printing facility what is the probabilty that he also has internet ?
P(i | p) = P(p AND i)/P(p) = 0.15/0.25 = 0.6
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Cheers,
Stan H.
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