Expenses (in multiples of ₹10,000/-) on consumption of fuel for the official car at a regional office (RO) of a national organization during 2006 - 2010 are given below in a tabular form along with the National Averages (NA) during the said period. It is given that there are five ROS.
| Year | 2006 | 2007 | 2008 | 2009 | 2010 |
| RO | 20 | 22 | 23 | 24 | 25 |
| NA | 18 | 17 | 19 | 18 | 23 |
If the data of RO, given in the table, is not taken into account, then what would be the NA (in multiples of 10,000/-) in 2006?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 17.5.
Number of ROs = 5 and NA in 2006 = 18
Total expense for all 5 ROs in 2006 = 18 × 5 = 90
The expense of RO given in the table in 2006 = 20
Total expense for all remaining 4 ROs in 2006 = 90 - 20 = 70
NA for all remaining 4 ROs in 2006 = 70/4 = 17.5