Question

In a survey of 100 NAU students, the following information was obtained:

               45 students had taken an accounting class

               40 students had taken an economics class

               29 students had taken a marketing class

               15 students had taken both accounting and economics classes

               14 students had taken both economics and marketing classes

               22 students had taken both accounting and marketing classes

               12 students had taken all three classes

1. How many students took accounting and marketing classes, but not an economics class?

2. How many students did not take any of the classes?

3. What is the probability that a randomly chosen student took all three classes?

Answer 1