Correct Answer - Option 3 : 600

Given:

The sale in 2019 = Rs 9200

Formula used:

Average = Sum of the total terms/Total number of the terms

Calculation:

The total cost of sale of furniture in 2015, 2016, 2017, 2018 = 16300 × 4 = 65200

The total cost of sale of furniture in 2016, 2017, 2018, 2019 = 18450 × 4 = 73800

The total cost of sale of furniture in 2016, 2017, 2018 = 73800 – 9200 = 64600

The sale in 2015 = 65200 – 64600 = 600

∴ The sale of the furniture in the year 2015 is 600