Tanya prepared 4 different letters to be sent to 4 different addresses. For
each letter, she prepared an envelope with its correct address. If the 4
letters are to be put into the 4 envelopes at random, what is the probability
that only 1 letter will be put into the envelope with its correct address?
(A) 1/24
(B) 1/8
(C) 1/4
(D) 1/3
(E) 3/8
請問這題怎麼算?
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 163.13.36.176