Mathematics · Data Interpretation

Three pouches are kept in each of the nine slots in a 3 × 3 grid. Every pouch has a certain number of one-rupee coins. The minimum and maximum amounts of money (in rupees) among the three pouches in each of the nine slots are given as: Row 1: (2, 4), (6, 8), (1, 3); Row 2: (3, 5), (1, 1), (6, 20); Row 3: (1, 2), (1, 2), (2, 5). The average amount of money kept in the nine pouches in any column or any row is an integer. The total amount of money kept in the three pouches in the first column of the third row is Rs. 4. What is the number of slots for which the average amount (in rupees) of its three pouches is an integer?