Does a worm die after laying eggs?

Question

Do they die?

and also around how many eggs are laid each time?

Answer 1

Both of your questions depend on which species of worm you're referring to.

Answer 2

Earthworms do not die after laying eggs.  The information on the following web page is about a species of nightcrawler.

http://edis.ifas.ufl.edu/in047