Comprehension Passage
Directions: Answer the questions based on the information given below.
The table given below shows the number of society members living in four different directions - 'North', 'East', 'West' and 'South' of four different buildings - 'P', 'Q', 'R' and 'S'.
| Building | North | East | West | South |
|---|---|---|---|---|
| P | 182 | 187 | 173 | 178 |
| Q | 162 | 181 | 194 | 163 |
| R | 183 | 149 | 156 | 162 |
| S | 133 | 183 | 157 | 147 |
Find the difference between the total number of members who are living in all four directions of building 'R' and that of building 'S'?
1
10
2
20
3
30
4
40
5
50