If the mother also carries an x-linked genetic disorder, then there is 50% change for children (male or female) to actually have the disorder.
I meant if the mother has the same x-linked defective gene as the father, then there is 50% for either male or female to have the disorder.
If only the mother is a carrier, then 50% chance for the female child to be a carrier, and a 50% chance for a male child to actually have the disorder.