按C组划分:
1.0唱0跳,则有C5,4*C5,4=25种;
2.0唱1跳或1唱0跳,均为C5,4*C5,3*C2,1=100种;
3.1唱1跳,为C2,1*C5,3*C5,3=200种;
4.0唱2跳或2唱0跳,均为C5,2*C5,4=50种;
所以综上共有25+100*2+200+50*2=525种选法.
按C组划分:
1.0唱0跳,则有C5,4*C5,4=25种;
2.0唱1跳或1唱0跳,均为C5,4*C5,3*C2,1=100种;
3.1唱1跳,为C2,1*C5,3*C5,3=200种;
4.0唱2跳或2唱0跳,均为C5,2*C5,4=50种;
所以综上共有25+100*2+200+50*2=525种选法.