Question

72% of the total candidates were passed in the examination, if the number of failures is 392 then the total number of investigators has been found.

Answer 1

72% of the total candidates were passed in the examination.
it means (100-72) % = 28% of the total candidates were failed in the examination.

        here, number of failures is 392 
let total number of investigators is X
28 % of X = 392 
28 × X/100 = 392
 X = 392 × 100/28 = 1400
hence, total number of  investigators = 1400