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Question 56 To save time, Nivaldo's chemistry professor grades only two randomly chosen problems of a...

Question 56 To save time, Nivaldo's chemistry professor grades only two randomly chosen problems of a ten-problem assignment. Suppose that Nivaldo has 6 of 10 problems correct on the assignment.

(a) Compute the probability that both randomly chosen problems are correct. (Round your answer to four decimal places.)


(b) Compute the probability that both randomly chosen problems are incorrect. (Round your answer to four decimal places.)


(c) Compute the expected value of the number of correct problems chosen by the professor.

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