The following bar graph shows the monthly incomes (in thousand rupees) of Aman, Suman and Jyoti in six consecutive years.

What was the difference between the average monthly income of Jyoti over all the six years taken together and Aman's monthly income in the year 2006?

₹3000

Average monthly income of Jyoti = \(\frac{9+11+18+27+26+35 }{6}\)

= \(\frac{ 126 }{6}\)

= 21

Aman's monthly income in the year 2006 = 18

Required difference = 21 - 18 = 3  ( in thousands )

= 3000