Question

In a school, 5/8 of the students
are boys. If there are 261 girls,
find the number of boys in the
school.​

Answer 1

Answer:

Number of boys = 5/8 of 640

Therefore, Total no. of boys in a school are 400

Answer 2

ANSWER = 435

$total \: no \: of \: students \: \: \: \: = \frac{8x}{8}$

$number \: of \: boys \: \: \: \: \: = \frac{5x}{8}$

$no \: of \: girls \: \: \: = \frac{8x}{8} - \frac{5x}{8}$

$\: \: \: \: \: \: \: \: \: \: \: \: = \frac{3x}{8}$

$\frac{3x}{8} = 261$

$3x = 261 \times 8$

$x = \frac{261 \times 8}{3}$

$x = 696$

$x = \frac{8x}{8}$

$total \: number \: of \: students \: = 696$

$no. \: of \: boys \: = 696 - 261$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 435$