It might be that their education isn't well constructed, or that they are young ad have not learned those skills yet.
There are also students who suffer from learning disabilities, like ADD or dyslexia.
2,000 parents cannot read or write
There are millions of people on the planet who cannot read or write English !
A pen can write but it cannot read. Your question didn't say " cannot be read "
A literate person. Someone who cannot read and write is called illiterate.
people who cannot read or write starts begging.
People who cannot read and write are often referred to as illiterate.
illiteracy
yes
Illiterate.
As of 2008, the literacy rate was 63%. One in three adults in Africa cannot read or write. 176 million adults cannot read or write.
Read, write, execute, and functions in software objects.
Illiterate