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%
在c发生的情况下a和b的交集,图上看应该是10%