Question

in a school with 1200 children 60% are girls how many the number of girls and how many the number of boys​

Answer 1

Given :-

Number of students in the school = 1200 children

Percentage of girls = 60%

To Find :-

Number of girls.

Number of boys.

Analysis :-

Firstly find the number of girls in the school by dividing by 100 and multiply by the total number of students.

Once you get the number of girls, subtract that number from the total students in order to get the number of boys.

Solution :-

Using the formula,

$\underline{\boxed{\sf Number \ of \ girls=\dfrac{Percentage}{100} \times Total \ students }}$

Given that,

Percentage = 60%

Total students = 1200

Substituting their values,

$\sf =\dfrac{60}{100} \times 1200$

$\sf =60 \times 12$

$\sf =720 \ girls$

Therefore, there are 720 girls in the school.

Finding the number of boys,

Number of boys = Total students - Number of girls

Given that,

Total students = 1200

Number of girls = 720 girls

Substituting their values,

⇒ 1200 - 720

⇒ 480 boys

Therefore, there are 480 boys in the school.

Answer 2

$\large\underline{ \underline{ \sf \maltese\:{Given:-}}}$

• Number of children in the school = 1200
• Percentage of girls = 60 %

$\large\underline{ \underline{ \sf \maltese \:{To \: find:-}}}$

• The number of girls and boys in the school.

$\large\underline{ \underline{ \sf \maltese \:{Solution:-}}}$

The percentage of boys in the school:–

${:} \implies \sf{ \bigg(100 - 60 \bigg) \%}$

${:} \implies \sf{40 \: \%}$

Let:–

• The number of boys = x

$\qquad \therefore \: \sf{x = \dfrac{40}{100} \times1200 }$

${:} \implies \: \sf{x = \dfrac{40}{1 \cancel0 \cancel0} \times12 \cancel0 \cancel0 }$

${:} \implies \: \sf{x = 40 \times 12 }$

${:} \implies \: \boxed {\frak \red{x =480 }}$

So,

• The number of boys in the school = 480
• The number of girls in the school = 1200 - 480 = 720