6.57 The National Public Radio show Car Talk has a feature called The Puzzler. Listeners are asked...

Question:

6.57 The National Public Radio show Car Talk has a feature called “The Puzzler.” Listeners are asked to send in answers to some puzzling questions—usually about cars but sometimes about probability (which, of course, must account for the incredible popularity of the program!).

Suppose that for a car question, 800 answers are submitted, of which 50 are correct.

a. Suppose that the hosts randomly select two answers from those submitted with replacement.

Calculate the probability that both selected answers are correct. (For purposes of this problem, keep at least five digits to the right of the decimal.)

b. Suppose now that the hosts select the answers at random but without replacement. Use conditional probability to evaluate the probability that both answers selected are correct. How does this probability compare to the one computed in Part (a)?

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