In a class of boys and girls, the number of girls is twice the number of boys. If 30 mere boys join the class, the ratio of girls and boys is 1: 1. How many total students were there in the class initially?
Solution- In a class- Boys =x and Girls =2x ATQ- The ratio of girls and boys after joining 30 new boys- 2x /x+30 =1/1 2x =x+30 x =30 Total students in class =2x+x=3x =3×30=90
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