两道SAT2数学题1. A hotel has five single rooms available, for which six men and three women apply.What is the probability that the rooms will be rented to three men and two women?2.Of all the articles in a box, 80% are satisfactory, while 20% ar

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/06 11:09:16
两道SAT2数学题1. A hotel has five single rooms available, for which six men and three women apply.What is the probability that the rooms will be rented to three men and two women?2.Of all the articles in a box, 80% are satisfactory, while 20% ar

两道SAT2数学题1. A hotel has five single rooms available, for which six men and three women apply.What is the probability that the rooms will be rented to three men and two women?2.Of all the articles in a box, 80% are satisfactory, while 20% ar
两道SAT2数学题
1. A hotel has five single rooms available, for which six men and three women apply.What is the probability that the rooms will be rented to three men and two women?
2.Of all the articles in a box, 80% are satisfactory, while 20% are not. The probability of obtaining exactly five good items out of eight randomly selected articles is?
请附上详细过程及讲解.
另外,第二题答案上是这样说的.
Since the problem doesn't say how many articles are in the box, we must assume that it is an unlimited number. The probability of picking 5 satisfactory items(and therefor 3 unsatisfactory ones) is (0.8)5(0.2)3,这里5和3是次方.and there are(85){前面小括号里85是竖排的,上面是8,下面是5,请问这里什么意思}ways of doing this.Therefore, the desired probability is(85)(0.8)5(0.2)3约等于 0.147 .最后这个式子是怎么回事?

两道SAT2数学题1. A hotel has five single rooms available, for which six men and three women apply.What is the probability that the rooms will be rented to three men and two women?2.Of all the articles in a box, 80% are satisfactory, while 20% ar
第一题:
男女分五个房间的总数可能性是:P=C62*C33+C63*C32+C64*C31+C65*C30(这个文本框编辑要求达不到 所以学数学你应该也懂吧 前面的数字是下面 后面的数字是上面)
概率:C63*C32/P
第二题:
因为一盒东西放在那里,不知道总数,所以说明其中每个物品合格的概率是80%=0.8 不合格的概率是20%=0.2 那么从中挑出八个物品正好是五个好的三个坏的.但是在你挑的时候,哪出的物品顺序是不同的,所以用插空法可得出总共的顺序次数为A=C61+C31*C62+C63 这些物品哪出的概率为B=(0.8)5(0.2)3 所以最后的概率
P=A*B

两道SAT2数学题1. A hotel has five single rooms available, for which six men and three women apply.What is the probability that the rooms will be rented to three men and two women?2.Of all the articles in a box, 80% are satisfactory, while 20% ar 两道SAT2的数学题,求英语数学专家!1.A cell phone provider charges 0.4刀 for the first minute of a call and 0.2刀 for each additional mitute or each additional portion of a minute.The cost of a call,C,is given by the model C=0.4+0.2T wher SAT2 Sat2 请教一道sat2数学题首先想问一下,sat2数学都是单选还是多选这道题我算出来两个答案,A和B,假如是单选的话,不知道有一个为什么错了, run a hotel 英语翻译1.______ ______ a hotel _____ ______ _______?2.______ ______ the hotel?3.______ ______ ______ ______ ______ the hotel?4.______ ______ ______ ______ ______ the hotel?5.______ ______ ______ ______ _______ ______ ______ the hotel? WHAT'S THREE LETTERS TURN AGIRL INTO A WOMAN?1.SAT2.EGA3.DAB 两道数学题,学霸求戳 两道数学题〜 两道选择,数学题 两道数学题.快! 两道数学题,学霸请戳 SAT2 物理巴郎原题1.If friction is negligible,when a gas is compressed rapidly——到底是升温还是液化啊?为什么用中文查加压后会发生什么两种答案都出现过啊? 几道GRE数学题1.In a series of races,10 toys cars are raced,2 cars at a time.If each car must race each of the other cars exactly twice,how many races must be held?2.The daily rate for a hotel room that sleeps 4 people is $39 for one person and x in a hotel和at a hotel有什么区别 There is a hotel 可以改为:Here is a hotel a hotel的汉语是什么