In a class of 60 students, the ratio of girls to boys is 2 : 3. If 20 more girls join the class, then what is the new number of girls in the class?

44

Girls : Boys = 2 : 3

⇒ Total no. of students = 60

⇒ (2 + 3) units = 60

⇒ 5 units = 60

⇒ 1 unit = 12

⇒ Girls = 2 x 12 = 24

⇒ If 20 more girls are added the total number of girls = 24 + 20 = 44.