NO.PZ2020010301000016
问题如下:
Based on the probabilities in the diagram below, what is the value of the following?
Pr(A∪B|C)
选项:
A.
10%
B.
81.1%
C.
53%
D.
18.9%
解释:
Pr(A∪B|C) = Pr((A∪B)∩C)/Pr(C) = (15% + 10% + 18%)/53% = 81.1%
为什么是/C发生的概率,而不是*C发生的概率?