In three families (a, b, and c), the distribution of boys and girls differs. Family a has 1 boy and 3 girls, family b has 3 boys and 3 girls, and family c has 7 boys and 5 girls. A child is randomly selected from a family, then a child is randomly selected from that family. Calculate the probability of selecting a girl.
a. 0.5000
b. 0.3333
c. 0.4000
d. 0.4167
