Disclaimer: I am not an expert in mental/intellectual disorders.
From Wikipedia (and cited to boot!):
The last table in that section states that adults with an IQ of 60 "...can harvest vegetables, repair furniture."
In early childhood, mild intellectual disability (IQ 50–69) may not be obvious, and may not be identified until children begin school. Even when poor academic performance is recognized, it may take expert assessment to distinguish mild intellectual disability from learning disability or emotional/behavioral disorders. People with mild intellectual disability are capable of learning reading and mathematics skills to approximately the level of a typical child aged nine to twelve. They can learn self-care and practical skills, such as cooking or using the local mass transit system. As individuals with intellectual disability reach adulthood, many learn to live independently and maintain gainful employment.
So not quite a carrot.