一道SAT概率题求解TOT 之前有人问过,可是过程没看明白.能否详细点= =A,B,C,D ,E ,F,Ga list consists of all possible three-letter arrangements formed by using the letters above such that the first letter is D and one of the remain
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![一道SAT概率题求解TOT 之前有人问过,可是过程没看明白.能否详细点= =A,B,C,D ,E ,F,Ga list consists of all possible three-letter arrangements formed by using the letters above such that the first letter is D and one of the remain](/uploads/image/z/4313535-15-5.jpg?t=%E4%B8%80%E9%81%93SAT%E6%A6%82%E7%8E%87%E9%A2%98%E6%B1%82%E8%A7%A3TOT+%E4%B9%8B%E5%89%8D%E6%9C%89%E4%BA%BA%E9%97%AE%E8%BF%87%2C%E5%8F%AF%E6%98%AF%E8%BF%87%E7%A8%8B%E6%B2%A1%E7%9C%8B%E6%98%8E%E7%99%BD.%E8%83%BD%E5%90%A6%E8%AF%A6%E7%BB%86%E7%82%B9%3D+%3DA%2CB%2CC%2CD+%2CE+%2CF%2CGa+list+consists+of+all+possible+three-letter+arrangements+formed+by+using+the+letters+above+such+that+the+first+letter+is+D+and+one+of+the+remain)
一道SAT概率题求解TOT 之前有人问过,可是过程没看明白.能否详细点= =A,B,C,D ,E ,F,Ga list consists of all possible three-letter arrangements formed by using the letters above such that the first letter is D and one of the remain
一道SAT概率题求解TOT 之前有人问过,可是过程没看明白.能否详细点= =
A,B,C,D ,E ,F,G
a list consists of all possible three-letter arrangements formed by using the letters above such that the first letter is D and one of the remaining letters is A.if no letter is used more than once in an arrangement in the list and one three-letter arrangement is randomly selected from the list,what is the probability that the arrangement selected will be DCA?
一道SAT概率题求解TOT 之前有人问过,可是过程没看明白.能否详细点= =A,B,C,D ,E ,F,Ga list consists of all possible three-letter arrangements formed by using the letters above such that the first letter is D and one of the remain
一共是three-letter,第一个已经确定是D,又说three-letter有A.所以A在第3个的概率是1/2.从剩下5个字母中选C的概率是1/5..1/2 * 1/5= 1/10