问题
单项选择题
Which of the following sets of numbers does NOT meet the requirements for a set of probabilities（）
A. (0.50, 0.50).
B. (0.25, 0.25, 0.25, 0.25).
C. (0.10, 0.20, 0.30, 0.40, 0.50).
答案
参考答案：C
解析：
A set of probabilities must sum to one.