Remember that most probability questions are kind of like fractions .
So in all , there is 8 people because 4 girls and four boys.
So we need a fraction to represent the probability of 3 of the same gender .
If they are all the same gender . Then the probability would be 3/4 or another fraction to show both genders combined is 3/8.
You don't need to reduce since it's already in its lowest form.
I hope this helps!