题目
x>0
The probability that event A will occur is x, and the probability that event A will not occur is y, where y>3x.
选项
A.The quantity in Column A is greater.
B.The quantity in Column B is greater.
C.The two quantities are equal.
D.The relationship cannot be determined from the information given.
解析
P(A)=x
A的对立事件的概率P=y
又因为:A的对立事件的概率P=1-P(A)=1−x
所以:
1−x=y
同时已知 y>3x
因此 1−x>3x
1>4x
x<1/4
因为 1/4=0.25,1/5=0.2
x可以为0.23,因此选项A成立
x可以为0.15,因此选项B成立
最终答案为选项D