SAT数学题,有关概率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 remaining letters is A. if no letter is used more than once in an

SAT数学题,有关概率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 remaining letters is A. if no letter is used more than once in an 请教一道和概率和不定式有关的数学题一名篮球运动员投篮一次得三分的概率为a,得二分的概率为b,不得分的概率为c.a,b,c属于（0,1）,已知投篮一次的均值为2,则3a-1/b的最大值为 请高手帮忙解一道有关概率的数学题设有a,b,c和-a,-b,-c六个条件(-a,-b,-c是a,b,c的相反条件,也就是说不可能同时满足a和-a,b和-b或c和-c)设X是一辆小车,它只能向前或者向后运动,不能停止.当X单独 一道sat数学题正解c SAT数学题 Function f is defined by f(x)=(x-a)(x-b)/(x-c),where 0 sat数学题一道,正答是A. SAT 数学题 求简单方法这道题选C SAT数学题一道,请问为什么不是C, 问一道SAT数学题Which of the following integers,when rounded to the nearest thousand,resaults in 2000A 2567B 1499C 1097D 1601E 2700 We sat ( )the fire . A beside B over C under sat数学题 概率 P(S,A|T)和概率P(S|A,T)分别是指什么意思 它们等于什么? 看书上有P(A,B|C)=P(A|B,C)P(B|C)谁能解释说明一下,谢谢!为什么有下面这两个 能讲一下吗？P(S,A|T)=P(SAT)/P(T)P(S|A,T)=P(SAT)/P(AT) Most of undergraduates ( )the Band 4 Test.A sat on B sat for C sat with D sat by选什么,为什么? 有关概率正态分布彩票某个数A的开奖概率为b,标准差为c,则数A开奖间距期数D是不是满足正态分布（1/b,c）1/b是A开奖间距的期望值?没人回答吗 求解SAT数学题!On the number line above , the tick marks are equally spaced. Which of the lettered points represents y ? (A) A(B) B(C) C(D) D(E) E 答案选E!为神马! A、B、C,相互独立,事件A发生概率a,事件B发生概率b,事件C发生概率c,ABC同时发生概率怎么算 Mary__by the river when a black cat ran past her.A,sat B,has sat C,was sitting D,sits 初中数学题(a+b-c)^2*(c-a-b)^3