What is the mean of the data t, 2t-1, t-2, 2t -1, 4t and 2t+2?
Find the median of 4, 1, 4, 1, 0, 4, 4, 2 and 0
| No. of Days | 1 | 2 | 3 | 4 | 5 | 6 |
| No. of students | 20 | 2x | 60 | 40 | x | 50 |
The distribution above shows the number of days a group of 260 students were absent from school in a particular term. How many students were absent for at least four days in the term?
5, 8, 6 and k occur with frequency 3, 2, 4, and 1 respectively and have a mean of 5.7. Find the value of k?
