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F(X)=(pi)/(2+tan^(-1))(x)/(pi)-inftyltxl...

`F(X)=(pi)/(2+tan^(-1))(x)/(pi)-inftyltxltinfty` is a distribution of a continous random variable X then `P(X le 1)` is

A

`3/4`

B

`1/4`

C

`1/2`

D

`(pi)/(2)`

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a
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