In a class , the number of girls is 20% more than that of boys. The strength of the class is 66. If 4 more girls are admitted to the class , the ratio of the number of boys to that of the girls is -
In a class , the number of girls is 20% more than that of boys. The strength of the class is 66. If 4 more girls are admitted to the class , the ratio of the number of boys to that of the girls is - Correct Answer 3 : 4
Correct option is A)Let the number of boys be x.Then, number of girls = 120% of x 100120×x=56xGiven, x+56x=66⇒511x=66⇒x=30∴Numberofboys=30,numberofgirls=56×30=36If 4 more girls are admitted then new number of girls = 40∴ Required ratio = 30:40 = 3:4