word problems on linear equations

Asked by rohit1993 | 22nd Jun, 2008, 03:46: PM

Expert Answer:

girls : boys = 2 :3

and total students are 40

Number of girls = 2/5 x 40  = 2 x 8 = 16

Number of boys = 3/5 x 40 = 3 x 8 = 24

5 new students came so total number of students = 45

if the new ratio should be 4 : 5

then number of girls = 4/9 x 45 = 20

number of boys = 5/9 x 45 = 25

earlier the number of boys was 24 so out of new 5 student 1 student has to be a boy.

Answered by  | 22nd Jun, 2008, 04:17: PM

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