Mathematics, 17.02.2020 23:59 only1kariyah

Four buses carring 156 high school students arrives in Montreal. The buses carry, respectively, 36, 43, 28 and 49 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 expectatons and variances of X and Y;

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

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Four buses carring 156 high school students arrives in Montreal. The buses carry, respectively, 36,...