Question

solve in a examinatipn 90%of candidate passed and 80 candidate failed.how many candidate had appeared in examination?​

Answer 1

Explanation:

Let, the total number of candidates appeared in the examination be x.

Here,

% of passed candidates=90%

No of passed candidates=90% of x

=(90/100)×x

=9x/10

No of failed candidates=80

Now,

(9x/10)+80=x

or, (9x+800)/10=x

or, 9x+800=10x

or, 800=10x-9x

or, 800=x

x=800

Therefore, total no of candidates appeared in the examination=800