Question

please solve for me​

Answer 1

let the total number of students are class is x

ATQ

$\frac{4x}{9} + 775 = x \\ \frac{4x +6975 }{9} = x \\ 4x + 6975 = 9x \\ 6975 = 5x \\ 1395 = x$

boys in class

$\frac{4x}{9} \\ \frac{4}{9} \times 1395 \\ 155 \times 4 \\ 620$