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.
-Determine the probability that a randomly selected customer orders either a hamburger or French fries.

Question

Quizplus · Accepted Answer

The Answer is By the addition rule,

\operatorname{Pr}(H

or

F)=\operatorname{Pr}(H)+\operatorname{Pr}(F)-\operatorname{Pr}(H

and

F)=.70+.50-.45=.75

.

Suppose That 70% of the Customers at a Particular Fast