Question

find the % of girls in a school if total no of student 150 and ratio of boys and girls is 3:2​

Answer 1

Answer:

ratio of boys and girls is 3:2

boys=3x

girls=2x

total no of student is 150

$2x + 3x = 150 \\ 5x = 150 \\ x = \frac{150}{5} \\ x = 30 \\ no \: of \: girls = 2 \times 30 = 60$

Answer 2

Given:-

Number of students = 150

To find:-

Percent of girls in the school.

Answer:-

⇒Let the common factor be x

⇒3x and 2x

⇒3x + 2x = 150

⇒5x = 150

⇒x = $\frac{150}{5}$

⇒x = 30

⇒3x = 30 × 3

⇒ 90 boys

⇒2x = 30 × 2

⇒60 girls

Now percentage of girls in the school:-

⇒ $\frac{60}{150}$ × 100

⇒ 40%

Hence the answer is 40%