A couple, in which the husband has hemophilia and color-blindness and the wife (as well as all her known relat?

A couple, in which the husband has hemophilia and color-blindness and the wife (as well as all her known relatives) are not affected, had a daughter who married an unaffected man. uming that the genes responsible for hemophilia and colorblindness are X-linked at 20 m.u., the probability of the first child of the younger couple being a boy with either hemophilia or color-blindness (but not both) is?