数学,最后一题怎么写

2025-03-15 16:47:02
推荐回答(1个)
回答1:

答案D!
这是选择题,所以,不要严格求答案,判断即可。
这样考虑:平均分和人数已定,那么总分已定!所有人总分必须是79X20=1580分。如果要让分差最大,那么必然高分最高,低分最低,则分差最大。那么这时,假设第一名满分100,然后1-6名,每名次差一分,这时前6名分别是,100,99,98,97,96,95!前五名平均98分,则16-20名平均分为49分!这将是分差最大情况。
这时需要验证一下,前五名平均98分,后五名平均49分,那么这10个人总分是:98X5+49X5=735分!那么6-15名,总分为1580-735=845分!10个人平均分为84.5分!完全可以做到!
所以,第6名,95分,第15名,52分!分差43分!

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