Question

if 70% of the student in a school are boys and the number of girls is 420 then the number of boys is​

Answer 1

Answer:

your answer is 980

Step-by-step explanation:

let total no. of students = X

70%of X = no.of boys

70X/100 = 7X/10

no.of boys + no.of girls = total no.of students

7X/10 + 420 = X

7x+4200/10 = X

7x + 4200 = 10x

4200 = 3x

X = 4200/3 = 1400

no.of boys = 1400 - 420

= 980

HOPE it will help you