there are 5 envelope and 5 letters placed at random. what is the probability that no single letter is placed in the right envelope
Choose the correct choice from the following.
A) 117/120 B) 118/120 C) 119/120 D) 116/120 E) 115/120
probability that no single letter is placed in the right envelop is = 1- (placing all the letters in the right envelop)   i.e 5 letters will go in their right envelops in only 1 way, and total cases is 5!   so, 1-(1/5!) = 119/120   ANSWER:119/120
<result>C</result>
there are 5 envelope and 5 letters placed at random. what is the probability that no single letter is placed in the right envelope