Question

In the exam 45 percent students failed n 550 students were successful.find total number of students who appeared in exam ..????

Answer 1

1000 students

Explanation:

If 45% failed then 55% passed.

Let the total number of students who appeared in exam be y.

Then:

`55\% \: of \: y = 550`

This implies that:

`(55y)/(100) = 550`

Multiply both sides by 100 to get:

`55y = 550 * 100`

Divide through by 55 to obtain:

`y = (550 * 100)/(55)`

Cancel out the common factors:

`y = 10 * 100`

Simplify to get:

`y = 1000`

Therefore 1000 students appeared in the exam.