解:1.C2/6xC2/4=90; 2.(C2/6xC2/4)/A3/3=15; 3.C1/6xC2/5=60; 4.C1/6xC2/5xA3/3=360; 5.【(C2/6xC2/4)/A3/3+C1/6xC2/5+C1/6xC1/5/A2/2】xA3/3=540。不懂可以问。