設(shè)隨機(jī)變量X~N(3,22),且P{X>c}=P{X≤c},則常數(shù)c=()
A.0B.2C.3D.4
A.0B.0.2C.0.4D.1
A.(-0.127,,0127)B.(-0.156,0.156)C.(-0.115,0.115)D.(-0.129,0.129)