question_answer

There are 4 envelopes with addresses and 4 concerning letters. The probability that letter does not go into concerning proper envelope, is or There are four letters and four addressed envelopes. The chance that all letters are not despatched in the right envelope is             [RPET 1997; MP PET 1999; DCE 1999]

A)                 \[\frac{19}{24}\]  

B)                 \[\frac{21}{23}\]

C)                 \[\frac{23}{24}\]  

D)                 \[\frac{1}{24}\]