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Four buses carrying 161 high school students arrive to Montreal. The buses carry, respectively, 37, 49, 34, and 41 students. One of the studetns is randomly selected. Let X denote the number of students that were on the bus carrying this randomly selected student. One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations of X and Y

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