There are 8 letters and corresponding 8 envelopes. If 8 letters are placed into 8 envelopes randomly, find the number
of ways that exactly one letter is placed into wrong envelope.

• Answer is 0 because in 8 letter one letter is placed into wrong envelop means balance 7 are in correct place. so all 7 letters are in correct place means definitely the remaining 8th one is also placed correctly. so ans is 0
• 10 years agoHelpfull: Yes(14) No(1)
• 0 will b the answer since 2 letters is wrongly plced
  
• 10 years agoHelpfull: Yes(2) No(6)
• what is the answer ?
  
• 10 years agoHelpfull: Yes(0) No(1)