摘要: Suppose that a random variable X is such that E(X) = 3.2 and Var(X) = 1.8. Suppose further that Y is a random variable such that Y = 2X + 3.Find E(Y) and Var(Y) .
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①先产生两组0~1的均匀随机数,a=rand ( ),b=rand ( );
②做变换,令x=2a,y=2b;(3)产生N个点(x,y),并统计满足条件y<
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A semipro baseball league has teams with 21 players each. League rules state that a player must be paid at least $15,000,and that the total of all players’ salaries for each team cannot exceed $700,000. What is the maximum possible salary,in dollars,for a single player?
A. 270,000 B. 385,000 C. 400,000 D. 430,000 E.700,000
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如图,利用随机模拟的方法可以估计图中由曲线
与两直线x=2及y=0所围成的阴影部分的面积S:
①先产生两组0~1的均匀随机数,a=rand ( ),b=rand ( );
②做变换,令x=2a,y=2b;(3)产生N个点(x,y),并统计满足条件
的点(x,y)的个数N1,已知某同学用计算器做模拟试验结果,当N=1000时,N1=332,则据此可估计S的值为 .
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①先产生两组0~1的均匀随机数,a=rand ( ),b=rand ( );
②做变换,令x=2a,y=2b;(3)产生N个点(x,y),并统计满足条件