Percentages

grkmurthy · Senior Consultant Joined: 14 Oct 2007 Posts: 37

25% of the students in school A are girl students while 30% of the students of school B are girl students.If students of school B are 20% more than that of school A, then the number of girl students in school B is what percent of girl students of School A?

(1) 124
(2) 134
(3) 144
(4) 104
(5) 164

ksvickram · Senior Consultant Joined: 02 Jan 2008 Posts: 29

The answer is 144, choice 3.

Let A have 100 students, thus B will have 120 students (Since B has 20% more than A)

Boys in A : Girls in A = 25 : 75

Boys in B : Girls in B = 36 : 74

Thus, x% of the girl students in School A = girl students of School B
=> 25 * (x/100) = 36
Thus, x = 144