Suppose That 70% of the Customers at a Particular Fast $\{$

Short Answer

Suppose that 70% of the customers at a particular fast food restaurant order a hamburger, 50% order French fries, and 45% order both. Let H denote the event that a randomly selected customer orders a hamburger, and let F denote the event that he or she orders French fries.
-Are the events $\{$ customer orders a hamburger $\}$ and $\{$ customer orders French fries $\}$ independent? Justify your answer numerically.