Four letters (numbered 1, 2, 3, 4, 5) are to be placed in four envelopes (numbered 1, 2, 3, 4, 5), so that no letter goes into the right envlope. Also, letter 1 goes into envlope 2. How many ways can the other letters be placed?
+310 Did you type something wrong? There are five letters and five envelopes.
