The chance that they will have one girl is 1:5 because they are having 5 children and one is going to be a girl
2/5 = 42
1/5 = 21
5/5 = 105
105 students in the class
2+2-1 that's three quick maths.
30% is a way to express the fraction 30/100 = 3/10
So, 30% of 80 is
