Let the students be A and B Let the marks secured by B=x Marks secured by A=x+22 Sum of their marks of A & B=x+x+22=2x+22 Accoring to question, Marks of A=55% of the sum of marks ⇒x+22=0.55×(2x+22) ⇒x+22=1.1x+12.1 ⇒0.1x=9.9 ⇒x=9.9∕0.1=99 marks Marks secured by A=99+22=121 marks Therefore the correct answer is 121.