题目
X is a discrete random variable with possible outcomes X = {1,2,3,4}. Three functions f(x), g(x), and h(x) are proposed to describe the probabilities of the outcomes in X.「huixue_img/importSubject/1564548697453367296.png」The conditions for a probability function are satisfied by:
选项
A.f(x).
B.g(x).
C.h(x).
答案
B
解析
： B is correct. The function g(x) satisfies the conditions of a probability function. All of the values of g(x) are between 0 and 1, and the values of g(x) all sum to 1. ： B正确。 函数g(x)满足概率函数的条件。g(x)的所有值都在0和1之间，g(x)的所有值的和都是1。