15
15+31+4 ×100%=0.3×100%=30%;
13
13+24+3 ×100%=0.325×100%=32.5%;
4
15+31+4 ×100%=0.08×100%=8%;
3
13+24+3 ×100%=0.075×100%=7.5%;
32.5%>30%;
8%>7.5%;
答:优秀率六(2)班高,不合格率六(1)班高.
15
15+31+4 ×100%=0.3×100%=30%;
13
13+24+3 ×100%=0.325×100%=32.5%;
4
15+31+4 ×100%=0.08×100%=8%;
3
13+24+3 ×100%=0.075×100%=7.5%;
32.5%>30%;
8%>7.5%;
答:优秀率六(2)班高,不合格率六(1)班高.