6.奥运会上最令人激动的水上比赛项目应该是200米混合泳接力项目,现某个代表队有5名队员,他们各-|||-泳姿的比赛成绩如表 8-14 所示(单位:s).-|||-表 8-14-|||-泳姿 A1 ^A2 A, A4 A5-|||-仰泳 36.3 33.1 33.8 37.0 35.4-|||-蛙泳 42.4 34.2 32.2 34.7 31.8-|||-蝶泳 33.3 28.5 38.9 30.4 33.6-|||-自由泳 29.2 26.4 29.6 28.5 31.1-|||-如何选拔队员才能使比赛成绩最好?

】:设Ai为第i泳姿的最好成绩,i=1,2,3,4,5,则Ai=min{36.3,33.1,33.8,37.0,35.4}=33.1sA2=min{42.4,34.2,32.2,34.7,31.8}=31.8sA3=min{33.3,28.5,38.9,30.4,33.6}=28.5sA4=min{29.2,26.4,29.6,28.5,31.1}=26.4sA5=min{33.3,34.2,32.2,34.7,31.8}=31.8s因此,最好成绩为33.1+31.8+28.5+26.4+31.8=151.6s
:设Ai为第i泳姿的最好成绩,i=1,2,3,4,5,则Ai=min{36.3,33.1,33.8,37.0,35.4}=33.1sA2=min{42.4,34.2,32.2,34.7,31.8}=31.8sA3=min{33.3,28.5,38.9,30.4,33.6}=28.5sA4=min{29.2,26.4,29.6,28.5,31.1}=26.4sA5=min{33.3,34.2,32.2,34.7,31.8}=31.8s因此,最好成绩为33.1+31.8+28.5+26.4+31.8=151.6s