英语翻译there are 6 red,6 brown,6 yellow,and 6 gray scarves pack
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英语翻译
there are 6 red,6 brown,6 yellow,and 6 gray scarves packaged in 24 identical,unmarked boxes,1 scarf per box.What is the least number of boxes that must be selected in order to be sure that among the boxes selected 3 or more contain scarves of the same color?
晕了,..
there are 6 red,6 brown,6 yellow,and 6 gray scarves packaged in 24 identical,unmarked boxes,1 scarf per box.What is the least number of boxes that must be selected in order to be sure that among the boxes selected 3 or more contain scarves of the same color?
晕了,..
现有6条红色,6条棕色,6条黄色和6条灰色的丝巾,
把这24条丝巾放进24个一样的,没有标志的盒子,每个盒子放1条.
现选择一些盒子,为了确保这些被选中的盒子中容纳了至少3条同色的丝巾,最少需要多少盒子被选中?
现在就找最倒霉的情况,前面一直选都没能拿到3条同色的,即四色各两条,一共8条丝巾,没有哪一种颜色有三条,那么,第9条的时候,一定就有某种颜色的丝巾数量达到了3条.
所以答案是9
再问: 确实这样是正解, 但是它的问法: 最少需要多少盒子被选中, 最倒霉的应该是最多吧? 难道是我英文理解错误?
再答: 就是说,为了保证你在最倒霉的情况下依然能拿到3条颜色相同的丝巾,最少选9个。 这里的最少,是在不知道盒子里丝巾的颜色情况下,保证达成目标的下限。
把这24条丝巾放进24个一样的,没有标志的盒子,每个盒子放1条.
现选择一些盒子,为了确保这些被选中的盒子中容纳了至少3条同色的丝巾,最少需要多少盒子被选中?
现在就找最倒霉的情况,前面一直选都没能拿到3条同色的,即四色各两条,一共8条丝巾,没有哪一种颜色有三条,那么,第9条的时候,一定就有某种颜色的丝巾数量达到了3条.
所以答案是9
再问: 确实这样是正解, 但是它的问法: 最少需要多少盒子被选中, 最倒霉的应该是最多吧? 难道是我英文理解错误?
再答: 就是说,为了保证你在最倒霉的情况下依然能拿到3条颜色相同的丝巾,最少选9个。 这里的最少,是在不知道盒子里丝巾的颜色情况下,保证达成目标的下限。
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