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Of the 65 students enrolled in a statistics class last semester, 38 worked during the semester and 31 used the recommended textbook. 20 of those who used the recommended textbook also worked during the semester. Report answers accurate to 4 decimal places. 1. What is the probability that a randomly selected student from the class: a) did not work during the semester? 0.4153 b) used the recommended textbook but did not work during the semester? 0.1692 c) either used the recommended textbook or worked during the semester? 0.7076 X d) neither worked during the semester nor used the recommended textbook? 19 X
2. If two students were selected from the class, one after the other and without replacement, what is the probability that: a) the second student used the recommended textbook given the first student also did? 0.5312 x b) the second student used the recommended textbook given the first did not? 0.5937 X c) both students worked during the semester? 0.3105 X d) only the second student used the recommended textbook? 0.2737 X e) only one of the two students used the recommended textbook? 0.2740 f) none of the two students worked during the semester? 0.2667 X g) at least one of the two students worked during the semester? 0.7333 X