Question: Class Levels. A frequency distribution for the class level of students in Professor Weisss introductory statistics course is as follows. Class Frequency Freshman 6 Sophomore

Class Levels. A frequency distribution for the class level of students in Professor Weiss’s introductory statistics course is as follows.

Class Frequency Freshman 6 Sophomore 15 Junior 12 Senior 7 Two students are randomly selected without replacement. Determine the probability that

a. the first student obtained is a junior and the second a senior.

b. both students obtained are sophomores.

c. Draw a tree diagram for this problem similar to Fig. 4.25 on page 216.

d. What is the probability that one of the students obtained is a freshman and the other a sophomore?

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