30%of a student in a school are girls .if the number of boys in the school is 490,the number of girls is ?
Answers
Answer:
Given :
Percentage of girls in the school = 30%
Number of boys in school = 490
Find :
Number of girls = Let the total number of students be x
The percentage of boys in = Percentage - Percentage of
school of students girl
= 100% - 30%
= 70%
The total number of =. let the total number of students be x
students According to given conditions
= 70/100 × x = 490
= x = 490 ÷ 70/100
= x = 490 × 100/70
= x = 700
The total number of girls = total number of. - total number of boys
students
= 700 - 490
= 210
∴ The number of girls in the school is 210.