Four buses carrying 140 high school students arrives in Montreal. The buses carry, respectively
Four buses carrying 140 high school students arrives in Montreal. The buses carry, respectively, 30, 42, 27, and 41 students. One of the students 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 and variances of X and Y:
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Four buses carrying 140 high school students arrives in Montreal. The buses carry
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