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, what is the probability that a family with three children has exactly 2​ girls? Based on the simulated​ data, the probability that a family with three children has exactly 2 girls is
nothing.
​(Type a whole number or a​ fraction.)