IBPS SO Prelims Exam Model Paper 10

Total number of employees in a company in year 2009 = 4000 + 5500 = 9500
Total number of employees in a company in year 2010 = 5000 + 4000 = 9000
Total number of employees in a company in year 2011 = 6000 + 3500 = 9500
Total number of employees in a company in year 2012 = 5000 + 6500 = 11500
Total number of employees in a company in year 2013 = 7500 + 7000 = 14500
Total number of employees who are using company's canteen = 9500 ×

30

100

+ 9000 ×

45

100

+ 9500 ×

40

100

+ 11500 ×

55

100

+ 14500 ×

60

100

= 2850 + 4050 + 3800 + 6325 + 8700 = 25725
Total number of employees in a company in five years = 9500 + 9000 + 9500 + 11500 + 14500 = 54000
⇒ Total number of employees in a company who are not using company's canteen in five years = 54000 – 25725 = 28275
∴ Required percentage =

(28275–25725)

28275

× 100 = 9.02% ≈ 9%