Question

passing result is 90%.if 12 students are failed.. then tell me how many students appears the examination ​

Answer 1

let number of passed be x

so

total students are x+12

(x/x+12) *100 =90

100x = 90x + 1080

10x = 1080

x = 108

but total students are x+12

108 + 12 = 120