There are 4 different letters and 4 addressed envelopes.In how many ways can the letters be put in the envelopes so that atleast one letter goes to the correct address ?
Answers.
A) 349  B) 77  C) 2087  D) 27066  E) 2811
Answer:77
<result>B</result>
There are 4 different letters and 4 addressed envelopes.In how many ways can the letters be put in the envelopes so that atleast one letter goes to the correct address ?