Of the a students at a certain college, x are studying French and y are studying German. If w are studying both French and German, which of the following expresses the number of students at the college not studying either French or German ?  Answers
A) a + w- x- y	B) a - w- x- y	C) a- w - x + y	D) w + x + y- z	E) w - x - y - z
{Total} = {French} + {German} - {Both} + {Neither}   a = x + y - w + {Neither}   {Neither} = a + w - x - y.   a + w- x- ynswer: a + w- x- y.
<result>A</result>
Of the a students at a certain college, x are studying French and y are studying German. If w are studying both French and German, which of the following expresses the number of students at the college not studying either French or German ?