来自傅间莲的问题
1,AcouplewantstotourfourcitiesinEurope(London,Hamburg,Paris,andZurich)ontheirhoneymoon.Ifanirineraryistheorderinwhichthesecitieswillbevisited,howmanyitinerariesarepossible?2,Howmanywayscanacommitteeoftwentypeopleel
1,AcouplewantstotourfourcitiesinEurope(London,Hamburg,Paris,andZurich)ontheirhoneymoon.Ifanirineraryistheorderinwhichthesecitieswillbevisited,howmanyitinerariesarepossible?
2,Howmanywayscanacommitteeoftwentypeopleelectapresident,secretary,andatreasurer?
