| Ages | 20 | 25 | 30 | 35 | 40 | 45 |
| Number of people | 3 | 5 | 1 | 1 | 2 | 3 |
Find the median age of the frequency distribution in the table above.
Find the difference between the range and the variance of the following set of numbers 4, 9, 6, 3, 2, 8, 10, 5, 6, 7 where \(\sum d^2\) = 60
A number is selected at random between 10 and 20, both numbers inclusive. Find the probability that the number is an even number
