David ranked 19th from the top and 25th from the bottom in his class. How many students are there in his class?
If the length of a cuboid is 4 cm, breadth is 46 cm and volume is 8832 cm³, then find the height (in cm) of the cuboid.
Find the median from the following data.
| Age in years | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 |
| No. of patients | 11 | 16 | 14 | 29 | 40 | 21 | 17 |