Exercise #4
The number of calories in a 1-ounce serving of a certain breakfast cereal is a random
variable with mean 110 and standard deviation 10. The number of calories in a cup of
whole milk is a random variable with mean 140 and standard deviation 12. For
breakfast, you eat 1 ounce of the cereal with 1/2 cup of whole milk. Let T be the
random variable that represents the total number of calories in this breakfast.
The standard deviation of T is... be sure to show/explain
your reasoning!
22
16
15.62
11.66