Eye color is determined by one genepair wih brown being domi

Eye color is determined by one gene-pair, wih brown being dominant and blue recessive. In a certain family, the husband had a blue-eyed father; he himself has brown eyes. The wife has blue eyes. They plan to have three children. What is the chance that all three children will have brown eyes?

Solution

husband has brown eyes that means her mothers must have brown eyes since brown is dominent\\

so

probability that all of their children has brown eyes =1 (because brown is dominent)