九(1 )班在“2012年新春联欢会,开设了一个摸奖游戏,规则:有4张纸牌,背面都是喜羊羊头像,正面2张是笑脸、2张是哭脸,将脸格势香室办4张纸牌洗匀后背面朝上摆放到桌面上,然后让同学去翻纸牌,若正面是笑脸,则获奖,若正面是哭脸,则不获奖。(1)若你有一次翻牌机会,从中随机翻开一张纸牌,获奖的概率是______医素愿群广是即衣错
试题答案府你掌存武府系抓句若:解:(1) (2)先翻和后翻获奖的可能性一样。 若甲先翻,则获奖的概率是, 若甲后翻,树状图如图所示,齐愿五弦岁怕乎七知甲获奖的概率是...
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一个戴白色头盔的人是情侣头像吗?
一个带白色头盔的***概率不是情侣头像。因为你光凭一张图片或者比较有意向的照片来判断是不是情侣头话,不太准确,你最好的还是主动问他,这是否是情侣头像?或者是问他身边的好朋友,确定...
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魔女皮肤头像怎么获得?
魔女皮肤头像是购买体验英雄概率赠送获得
第五人格alex头像怎么得?
第五人格头像怎么获得:1、记忆珍宝玩家可以通过记忆珍宝来有几率抽到各种头像,玩家可以用线索来进行抽取,目前想要抽到头像的机会还是比较大的,所以如果喜欢收集头像的话可以来试试看哦,...
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山海经异变头像多久可以换一次?
山海经异变头像在24小时可以刷新。山海经异变头像24小时同步一次。首先要让自己的宠物,和另一只野外异兽战斗。比如赤翎雕在斗兽中成功战胜大猩猩之后,就会概率触发【吞食抽取】,触发之...
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第五人格头像怎么获得怎么获得?
头像获得方法 1)点击我们的珍宝兑换,这里有记忆珍宝和赛季精华,可以抽奖的有的赛季精华,有的限时**。这里抽奖是可以抽到头像的,抽奖的概率是非常大的,头像的稀有度不是非常高,但是...
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《阴阳师》妖狐头像框怎么获得妖狐头像框获取攻略?
【LBS鬼王副本活动再开启】 LBS鬼王再临!现场成功挑战鬼王副本,有概率掉落胧车结界卡、妖狐头像框、惠比寿头像框等丰富奖励。凭挑战成功截图可在展台领取限量1500张的**卡...
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斗鱼头像框怎么获得?
王者荣耀斗鱼头像框这么获得从今天开始,前往斗鱼APP绑定王者荣耀游戏账号即可领取头像框更可提高豪礼中奖概率,赢iphone13等大奖。玩家们完成任务后还可以抽永久皮肤、永久英雄等...
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双子座女人爱换头像的原因?
对于双子座女生来说,头像就像是心情一样,每天都要换一换!双子座换头像的概率,总是跟随着心情,然而双子座的心情波动,也是十二星座当中最大的。他们心情好就换头像,觉得可以给自己换一种...
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第五人格三阶头像怎么获得?
头像获得方法1)点击我们的珍宝兑换,这里有记忆珍宝和赛季精华,可以抽奖的有的赛季精华,有的限时**。这里抽奖是可以抽到头像的,抽奖的概率是非常大的,头像的稀有度不是非常高,但是想...
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皮皮限头像怎么抽?
1、记忆珍宝玩家可以通过记忆珍宝来有几率抽到各种头像,玩家可以用线索来进行抽取,目前想要抽到头像的机会还是比较大的,所以如果喜欢收集头像的话可以来试试看哦,反正游戏而已,不要在意...
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火柴人**遗产巨人头像怎么获得?
火柴人**遗产巨人头像可以通过以下两个途径获得:1. 通过游戏中的抽奖系统获得:玩家可以在游戏中使用金币或钻石进行抽奖,有一定几率获得巨人头像或者其他珍贵物品。2. 通过参加游戏...
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为什么闺蜜不跟我用情头?
闺蜜不和你用情侣头像,大概率是因为她觉得不大好意思。因为情侣头像毕竟是情侣之间用的,如果你的闺蜜和你用情侣头像的话,可能会产生一些不必要的误会,或者被人认为是"txl&#...
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