Question

In a school,4/5 of the children are boys. and the number of girls is 200. Find the number of boys.​

Answer 1

$\bold\green{\underline{\underline{GIVEN:}}}$

• The number of boys=4/5
• The number of girls=200

$\bold\green{\underline{\underline{Let:}}}$

• The total number of children be X

$\bold\green{\underline{\underline{A.T.Q}}}$

$⇒number \: of \: boys + number \: of \: girls = total \: children \\ \\ ⇒ \frac{4}{5} x + 200 = x \\ \\ ⇒200 = \frac{x}{1} - \frac{4}{5} x \\ \\ ⇒200 = \frac{5x - 4x}{5} \\ \\ ⇒x = 1000$

HENCE,

$⇒number \: of \: boys = \frac{4}{5} x \\ \\ ⇒number \: of \: boys = \frac{4}{5} \times 1000 \\ \\ ⇒number \: of \: boys = 800$

$\bold\purple{\boxed{NUMBER\:OF\:BOYS=800}}$

$\bold\purple{\boxed{NUMBER\:OF\: TOTAL CHILDREN=1000}}$

Answer 2

Answer:

\bold\green{\underline{\underline{GIVEN:}}}

The number of boys=4/5

The number of girls=200

\bold\green{\underline{\underline{Let:}}}

The total number of children be X

\bold\green{\underline{\underline{A.T.Q}}}

⇒number \: of \: boys + number \: of \: girls = total \: children \\ \\ ⇒ \frac{4}{5} x + 200 = x \\ \\ ⇒200 = \frac{x}{1} - \frac{4}{5} x \\ \\ ⇒200 = \frac{5x - 4x}{5} \\ \\ ⇒x = 1000

HENCE,

⇒number \: of \: boys = \frac{4}{5} x \\ \\ ⇒number \: of \: boys = \frac{4}{5} \times 1000 \\ d

Number boys = 800

BOYS=800

TOTAL CHILDREN=1000