Question

in annual examination of a school 3 /40 of the total students used unfair means out of which 3 /4 were caught red handed. if number of students who escaped being caught is 15 find the total number of students

Answer 1

let total student be x
then students used unfair means are
3x/40
students caught are (3x/40)*(3/4)=9x/160
then students escaped are
(3x/40)-(9x/160)=15
or 3x/160=15
or x=(15*160)/3
or x=800..................(ans)

Answer 2

Answer:

answer is eight hundred