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求大神英语数学题翻译+解答Aboyandagirlareplayingcards.Therearealtogether52cards(including4types:redhearts,reddiamonds,blackspadesandblackclubs.Thereareonlyone1-pointcard,one2-pointcard......andone13-point
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求大神英语数学题翻译+解答
A boy and a girl are playing cards. There are altogether 52 cards (including 4 types: red hearts, red diamonds, black spades and black clubs. There are only one 1-point card, one 2-point card......and one 13-point card in each type of the cards). The boy shuffles and puts the cards with their black sides upwards. Now the girl picks out cards.In order to ensure that there must be 2 cards of the same point and color, how many cards at least should she pick out once? Then, to ensure that there must be 3 cards of the continuous points (ignore colors), how many cards at least should she pick out once?
A boy and a girl are playing cards. There are altogether 52 cards (including 4 types: red hearts, red diamonds, black spades and black clubs. There are only one 1-point card, one 2-point card......and one 13-point card in each type of the cards). The boy shuffles and puts the cards with their black sides upwards. Now the girl picks out cards.In order to ensure that there must be 2 cards of the same point and color, how many cards at least should she pick out once? Then, to ensure that there must be 3 cards of the continuous points (ignore colors), how many cards at least should she pick out once?
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答案和解析
一个男孩和一个女孩正在打牌。共有52张牌(包括4种类型:红色的心,红钻,黑黑桃和黑色的俱乐部只有一个1点卡,一个2张点卡......和一个13点的牌每个类型的卡)。男孩洗牌,并与他们的黑边朝上放卡。现在,这个女孩挑选出cards.In为了确保必须有2张卡的相同点和颜色,有多少卡至少应该她挑出一次?然后,以确保有一定的连续点(忽略颜色),有多少卡至少应该她挑选出一次3张牌?
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