IBPS RRB Officer Prelims 09 Sep 2017 Shift 1 Paper

(1) In 2013, income of company
A = Rs. I1 lakhs and its expenditure= Rs. E1 lakhs
Income of company B = Rs. I2
lakhs and its expenditure = Rs.E1 lakhs

I1–E1

E1

=

40

100

=

2

5

⇒5I1–5E1=2E1
⇒5I1=7E1...(i)
Again,

I2–E1

E1

=

45

100

=

9

20

⇒20I2–20E1=9E1
⇒20I2=29E1...(ii)
By equation (i) × 4 + (ii),
20(I1+I2)=28E1+29E1
⇒20×5.7=57E1
⇒E1=

20×5.7

57

=Rs.2 lakhs
∴Total expenditure
= Rs. 4 lakhs