A fair coin is used to simulate the gender of each child in a family
with three children. In the simulation, a coin that lands heads up (H)
represents a girl, and a coin that lands tails up (T) represents a boy.
The simulation is conducted to generate the gender of each child
from 10 families. Based on the simulated data recorded below, what
is the probability that a family with three children has exactly 2 girls?
Family 1: (HHT) Family 6: (HHH)
Family 2: (TTT) Family 7: (T H H)
Family 3: (H HH) Family 8: (THT)
Family 4: (HHT) Family 9: (T H H)
Family 5: (TTT) Family 10:(HTH)