Question

This question has to do with Multiplication Rule #1

Suppose the following: 
All freshmen students must take Intro to Business and Business Communications in their first semester. 60% of the freshmen students get assigned to Prof. Abernathy's Intro to Business Class, and 30% of students get assigned to Prof. Bertrand's BComm class. (You can presume that being assigned to one class is independent of your being assigned to the other.)

What is the probability that someone has Abernathy for Intro, but not Bertrand for BComm?

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