1、%-(10%+%+%)=%、只订阅B:%-(10%+%+%)=1%只订阅C:0%-(%+%+%)=1%只订阅一种纸:%+1%+1%=%、至少订阅一种纸:%+10%+%+%+%=1%、不订阅任何一种纸:1-1%=1%