Correction on Review Packet:
For 1st period: # 41 is answer C. There are 8 different ways to arrange the gender outcomes of 3 children:
GGG BGG GBG GGB BBG BGB GBB BBB
Two of them are all three same gender, so 2/8 = .250
.125 accounts for all 3 girls, but since the question just asks about same gender, so we must include the 3 boy outcome too.