Question 404726
In a certain class, 
40% of students are seniors, 
35% of the students are failing,  
25% are seniors who are failing. 
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What is the conditional probability that a student is failing given that he/she is a senior?
P(fail | senior) = P(fail and senior)/P(senior) = 0.25/0.40 = 0.625
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Cheers,
Stan H.
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