The bought the designs and materials.
It is stated nowhere that Ferengi culture disallows them from learning. Their society would not exist without scientists, engineers, etc. The same could be said of any given culture.
Ferengi females (up until the reformation begun by Grand Naguses Zek and Rom) were probably kept dumbed down as they were not allowed to own property or even wear clothing.
DarthLucifer 18:48, August 27, 2011 (UTC)