Low IQ

I was told I could not have AdHD because my iq test was 82 I am a 62 year old female I had higher sorces on short term memory but I do not remember what catagory I had the 82 on. Is this likely?  

ADHD is a different brain chemistry

I believe it can occur at any intelligence level although many people with ADHD are highly intelligent.

My sister, who has quite a low IQ and attended special-education schools, was diagnosed with it as a child.