Question

In a school 20% of students are below 9 years. The number of students above 9 years

of age is 560. What is the total number of students in the school?​

Answer 1

Step-by-step explanation:

Let the total number of students in school be x

Now ,percent of students whose age is above 9 years is 100-20=80%

80%of x=560

4/5 *x=560

X=560*5/4

X=140×5

X=700

Answer 2

$\small{\textsf{\textbf{\underline{\underline{Total number of students in the school is 700. \::}}}}}$

Step-by-step explanation:

Given that:

• In a school 20% of students are below 9 years.
• The number of students above 9 years of age is 560.

To Find:

• What is the total number of students in the school.

Let us assume:

• Total number of students be x.
• 20% of students are below 9 years = 20% of x.

Formula used:

• Total students = Number of students below 9 years + Number of students above 9 years

Finding the total number of students in the school:

According to the question.

⇒ x = 20% of x + 560

⇒ x = 0.2x + 560

⇒ x - 0.2x = 560

⇒ 0.8x = 560

⇒ x = 560/0.8

⇒ x = 700

$\small{\textsf{\textbf{\underline{\underline{∴ Total number of students in the school = 700\::}}}}}$