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?
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2020-04-28 18:03