(a) Number of pages in notebook X =120
Number of pages in notebook Y =110% of 120 = 132
Number of pages in notebook Z = 90% of 120 = 108
Total number of pages in all the notebooks = 120 + 132 + 108 = 360
Number of pages torn by Shayam
innotebook X = 5% of 120 = 6
in notebook Y = 10% of 132 = 13.2
in notebook Z =15% of 108 = 16.2
Total number of pages torn = 6 + 13.2+ 16.2 = 35.4
∴ Required percentage =
x 100 =9.8%