Question

the ratio of boy and girl in the school is 8:3 . the total number of girls are be 375 . find the number of boys in the school​

Answer 1

Answer:

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Answer 2

S O L U T I O N :

$\underline{\bf{Given\::}}$

The ratio of boy & girl in the school is 8 : 3, the total of girls are 375 .

$\underline{\bf{Explanation\::}}$

Let the total number of boy's be r .

• Boys = 8
• Girls = 3

A/q

$\mapsto\tt{Boy's:Girl's =Total\:boy's :Total\:girl's}$

$\mapsto\tt{8:3 = r:375 }$

$\mapsto\tt{\dfrac{8}{3} =\dfrac{r}{375} }$

$\mapsto\tt{3r =375 \times 8\:\:\:\underbrace{\sf{cross-multiplication}}}$

$\mapsto\tt{3r = 3000}$

$\mapsto\tt{r= \cancel{3000/3}}$

$\mapsto\bf{r=1000\:boy's}$

Thus;

The number of boys in the school will be 1000 boys .

If we know that total number of students in these school are ;

→ Total girls = 375

→ Total boys = 1000

→ Sum of total student = 375 + 1000 = 1375 .