[問題] 關於一題數學問題
At a certain pet show, exactly 6 dogs are entered in the beagle division and
exactly 6 are entered in the dalmation division. If the top 3 dogs in each
division receive first-, second-, and third-place ribbons respectively, with
no other dogs receiving a prize, how many different rosters of winners are
possible for the two divisions together?
A. 28800
B. 14400
C. 720
D. 400
E. 36
我選D.400 可是我不懂答案為什麼是B
有人可以提供我正確的思路嗎？
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 24.15.2.156
推
07/21 10:30, , 1F
07/21 10:30, 1F
→
07/21 10:32, , 2F
07/21 10:32, 2F
→
07/21 10:44, , 3F
07/21 10:44, 3F