What is mean iq for someone with cp?

Anything possible: Cerebral palsy can range from very severe physical and mental effects (quadruplegia & inability to communicate) to minimal local motor effects (one body part paralyzed or weakened) without any mental effects; there is no "average." I have known people with CP who are successful & happy doctors, professors, scientists, writers, musicians, artisits, spouses and parents. Accept no limits.

IQ/CP: If you mean "average" there is no such thing. CP conditions can range widely and affect different parts of the body - from mildly to severely.

No correlation: The brain injury that results in cerebral palsy is centered along the motor nerve cortex some distance from the thinking centers of the brain. You can have a person mentally deficient from brain injury that has no CP & you can have a genius with CP who had brain injury limited to the motor centers.