In a finance class, the final grade is based on three tests. historically, the i

Question

In a finance class, the final grade is based on three tests. historically, the instructor tells the class that the joint p In s finance class, the final grade is based on three tests. Historically, the instructor telsthe class that the oint probability of scoring A's on the first two tests isos Astudent assigns a probability of 0.9 that she wil get an 'AT on the first test. What is the probability that the student wil score an 'A' on the second test given that she scored an A on the first nest? O 055 O a 50 O 090 O 95 MacBook Pro

Explanation / Answer

P(scoring A on second test | scoring on A first test) = P(scoring A on first test and scoring A on second test)/P(scoring A on first test)

= 0.5/0.9 = 5/9 = 0.55

Option (a) 0.55

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