Question

in a school 5/9 of the students are boys and the number of girls in 800 find the number of boys

Answer 1

5/9 students are boys so there will be 4/9 students girls.
Therefore,
No. of boys = (800/4)×5
=1000 (ans)

Answer 2

let the total number of students be x.
no. of boys = 5/9 of x = 5x/9
therefore , no. of girls = x - 5x/9
= 4x/9
but the no. of girls = 800 (given)
therefore, 4x/9 = 800
x = 800 × 9/4
x = 1800
therefore total no. of students = 1800.
Hence, total no. of boys = 5 × 1800/9 = 1000