Vinod Kumar

let total no of students=T so in 9th class= T/4 in 10th class=T/3 in 11th class=T/6 so in 12th class=T-[(T/4)+(T/3)+(T/6)] = T/4 and is given that, students in 12th class= 300 so total students in school= 300*4=1200