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Of the z students at a certain college, x are studying [#permalink]
26 Feb 2006, 09:31
Of the z 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 ?
(A) z + w â€“ x â€“ y
(B) z â€“ w â€“ x â€“ y
(C) z â€“ w â€“ x + y
(D) w + x + y â€“ z
(E) w â€“ x â€“ y â€“ z