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Suppose that 30% of students go to sleep on time. If a student went to sleep on time, the probability that they felt well rested

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Suppose that 30% of students go to sleep on time. If a student went to sleep on time, the probability that they felt well rested was 0.80. Further, the probability that a student both did not go to sleep on time and felt well rested was 0.20. (a)) Find the probability that a student felt well rested.

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