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Mild Mental Retardation
About 85% of persons that are Mental Retarded fall into this group.
IQ level 50-55 up to about 70
Moderate Mental Retardation
About 10% of persons that are Mental Retarded fall into this group.
IQ level 35-40 to 50-55
Sever Mental Retardation
About 3% to 4% of persons that are Mental Retarded fall into this group.
IQ level 20-25 to 35-40
Profound Mental Retardation
About 1% to 2% of persons that are Mental Retarded fall into this group.
IQ level below 20 or 25
So some countries are mentally retarded on average?
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