In a class of 69 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course? Choose the correct choice from the following answers:
A) 6	B) 15	C) 24	D) 33	E) 54
Formula for calculating two overlapping sets:   A + 15 - both + NOT(A or 15) = Total   so in our task we have equation:   41 (french) + 22 (german) - 9 (both) + NOT = 69   54 + NOT = 69   NOT = 69 - 54= 
<gadget id="calculator">69 - 54</gadget>
<output>15</output>
15   So answer is 15
<result>B</result>
In a class of 69 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course?