X, Y, and Z are independently distributed. The probability of X is 30%, the probability of Y is 40%, and the probability of Z is 20%. Which of the following is closest to the probability that either X or Y will occur?

[单选题]Event X and event Y are independent events. The probability of X is 0.2 [P(

[单选题]Given the following data:There is a 40% probability that the economy will b

[单选题]The probability of Event A is 40%. The probability of Event B is 60%. The j

[单选题]The probability of event A is 40%. The probability of event B is 60%. The j

[单选题]The probability of Event A is 40%. The probability of Event B is 60%. The j

[单选题]有以下程序main(){ int x, y, z;x=y=1;z=x++,y++,++y;printf("%d,%d,%d/n",x,y,z);}程序运行后的输出结果是A．)2,3,3B．)2,3,2C．)2,3,1D．)2,2,1

[单选题]有以下程序 main() { int x，y，z； x=y=1；z=X++，y++，++y； printf("%d，%d，%d/n"，x，y，z)； } 程序运行后的输出结果是A．2，3，3B．2，3，2C．2，3，1D．2，2，1

[单选题]有以下程序： main() {int x,y,z； x=y=1; z=x++,y++,++y； printf("%d,%d,%d,%d/n",x,y,z)； 程序运行后的输出结果是( )。A．2,3,3B．2,3,2C．2,3,1D．2,2,1

[主观题]设有如下宏定义#define MYSWAP（z,x,y）{z=x;x=y;y=z;}以下程序段通过宏调用实现变量a，b内容交换,请填空。float a=5,b=16,c;MYSWAP（（ ）,a,b）;

[单选题]设X是一个集合ρ=X×X→R，如果关于任何x,y，z∈X，有(i)ρ(x，y)≥0，并且ρ(x，y)=0，当且仅当x=y；(ii)ρ(x，y)=ρ(y