Delhi Police Constable Exam Model Paper 5

Given, Satyam’s income is more than that of Sundar = Rs. 500
Formula:
If a number increase by x%, then increased number = Actual number ×[

(x+100)

100

]
Calculation:
Let Income of Sundar be 4x, then
Income of Shivam = 4x×[

5

4

]=5x
Income of Satyam =5x×[

6

5

]=6x
According to the question
6x–4x=500
⇒ 2x=500⇒x=250
Average income of Satyam, Shivam and Sundar =

(6x+5x+4x)

3

=5x=5×250=1250
∴ Average income of Satyam, Shivam and Sundar is Rs. 1250.