The import and export of a country ( in lakhs) during a certain period of time is given in the following bar graph. Read the graph and answer the questions carefully.
During which year the difference berween import and export is minimum?
What is the value of
\(
\frac{(p-q)^3 + (q-r)^3 + (r-p)^3}{12(p-q)(q-r)(r-p)}
\)
where
\(
p \neq q \neq r
\)
Calculate the mean from the following table.
| Scores | Frequencies |
| 0-10 | 2 |
| 10-20 | 4 |
| 20-30 | 12 |
| 30-40 | 21 |
| 40-50 | 6 |
| 50-60 | 3 |
| 60-70 | 2 |
The table shows number of books sold by 7 shops.
What is the difference between number of books sold by A and B together and the number of books sold by E and F together?
| Shops | Books |
| A | 34 |
| B | 48 |
| C | 50 |
| D | 100 |
| E | 64 |
| F | 110 |
| G | 16 |