Question

A company offered jobs to square root of half of all the students in a class and rejected the remaining . IF the company eejected 90% of the studebts of the class how manybstudents are there in the class ?

Answer 1

Explanation:

Let the number of students in the class be 'x'.

Company offered jobs to the following students,

$\sqrt{ \frac{1}{2} \times x } \\ \\ = \sqrt{ \frac{x}{2} }$

Also, according to question,

Company rejected 90℅ of students in the class.

So, we can say that the company selected or hired 10℅ of the students of the class.

Now, we can say,

Company offered jobs to 10℅ of x i.e. (x/10)

Hence,

$\sqrt{ \frac{x}{2} }$ = x / 2

Squaring both the sides,

x / 2 = x² / 4

x² / x = 4 / 2

x = 2

Hence, the number of students in the class = 2

Answer 2

Answer:

Let the number of students in the class be 'x'.

Company offered jobs to the following students,

\begin{gathered} \sqrt{ \frac{1}{2} \times x } \\ \\ = \sqrt{ \frac{x}{2} } \end{gathered}

2

1

×x

=

2

x

Also, according to question,

Company rejected 90℅ of students in the class.

So, we can say that the company selected or hired 10℅ of the students of the class.

Now, we can say,

Company offered jobs to 10℅ of x i.e. (x/10)

Hence,

\sqrt{ \frac{x}{2} }

2

x

= x / 2

Squaring both the sides,

x / 2 = x² / 4

x² / x = 4 / 2

x = 2

Hence, the number of students in the class = 2