Number of Birds Alana and Eva Are Sisters.Let X Denote the Number

Essay

Number of Birds
Alana and Eva are sisters.Let X denote the number of birds that Alana may have in the next two years,and let Y denote the number of birds Eva may have during the same period.The marginal probability distributions of X and Y are shown below. ​ ​
-{Number of Birds Narrative} Compute the mean and variance of X.