Question

In exam 45% student fail and 550 pass find total number of students who appeared in exam

Answer 1

100-45= 55%= 550
55= 550
1=10
100= 10×100= 1000 total student appeared.

Answer 2

Given: Sudents who failed in the exam = 45%

           Number of students who passed the exam = 550

To find: Total number of students who appeared in exam

Let: Total number of students be $x$

Solution: Given that 45% of total students failed in the exam. It means that rest 55% must have passed the exam.

Also, Number of students who passed the exam = 550

i.e. 55% of total students $(x)$ = 550

⇒ $\frac{55}{100} x = 550$

⇒ $x = \frac{550 \ * \ 100}{55} = 1,000$

Hence, total number of students who appeared in exam is 1,000.