Question

8 by 15 of the total number of students studying in a school are boys if there are 840 girls in the school find the number of students in the school

Answer 1

Answer:

given there are 15 total number of students and 8 are boys

Step-by-step explanation:

that means there are seven girls

there are 840 girls then the number of boys will b 600 so total number of students will be 1440

Answer 2

$\textsf{Let the total number of students be x}$

$\bold{Boys = \frac{8}{15} x}$

$\bold{Girls = x - \frac{8}{15} x = \frac{15x - 8x}{15} = \frac{7x}{15} }$

$\textsf{Now, according to the question}$

Girls= 750

Then,

$\bold{ \frac{7x}{15} = 840}$

$\bold{\implies \: x = \frac{840 \times 15}{7} }$

$\bold{\implies \: x = \frac{12600}{7} }$

$\boxed{ \bold \red{\bold \implies \: x = 1800}}$

$\therefore$Number of boys = Total students - Number of girls

= 1800- 840

$\boxed{ \bold{ = 960}}$