Of the p 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 ?
Choices:
A) p + w- x- y
B) p - w- x- y
C) p- w - x + y
D) w + x + y- z
E) w - x - y - z
{Total} = {French} + {German} - {Both} + {Neither}   p = x + y - w + {Neither}   {Neither} = p + w - x - y.   p + w- x- ynswer: p + w- x- y.
<result>A</result>
Of the p 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 ?