1. You get three x-mas presents from your aunts. You never know exactly how much money they will give you, but you know that Aunt Annie gives you on average $30 with a variance of 100, Aunt Becky gives you on average $50 with variance 200 and Aunt Celine gives you on average $100 with variance 400. Assuming independence,
2. What is the expected amount of money you will get from your aunts for x-mas?
3. What is the variance of the amount of money you expect to get for x-mas from your aunts?