Question: Explicitly compute the covariance if immigrants enter the two populations independently. Suppose immigration and emigration change the sizes of two populations with the following probabilities.

Explicitly compute the covariance if immigrants enter the two populations independently.
Suppose immigration and emigration change the sizes of two populations with the following probabilities.

Let Ia represent the change in population a and Ib the change in population b.

Population a Population b Number Probability Number Probability 0.1 0.3 0.2 0.4 0.4

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