Mathematics, 21.04.2020 22:50 JanetLee7907

Four buses carrying 163 high school students arrive to Montreal. The buses carry, respectively, 40, 41, 35, and 47 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.

E(X) ? Var (X)? E(Y)? Var(Y)?

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