5. A student takes a multiple-choice exam where each question has 5 possible answers. He works...

Question

Question

Answer 1

Answer #1

a)P(gets correct answer)=P(knows and gets correct answer)+P(guess and gets correct answer)

=0.8*1+0.2*1/5 =0.84

b)P(knew the answer given gets correct answer)=P(knows and gets correct answer)/P(gets correct answer)

=0.8*1/0.84 = 0.9524

Answer 2

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