​The following table shows the expenditure of a factory (in thousands) per annum over the given years.

Year	Raw material	Interest on loan	Sales
2014	88	13.4	321
2015	102	23.5	231
2016	91	31.6	119
2017	123	26.4	201
2018	132	39.4	108

What is the average amount of interest (in thousands) per year that the factory had to pay during the given period?

Correct option is C

Given:

Interest on loan (in thousands) for the years:

2014: 13.4

2015: 23.5

2016: 31.6

2017: 26.4

2018: 39.4

Formula Used:

Average interest = $$\frac{\text{Sum of interest values}}{\text{Number of years}}$$​​

Solution:

Total interest = 13.4 + 23.5 + 31.6 + 26.4 + 39.4 = 134.3

Average = $$\frac{134.3}{5}$$​ = 26.86