The quartile deviation of daily wages (in Rs.) of `7` persons given below is `12, 7, 15, 10, 17,17, 25` is

Find the mean of the daily wages of 60 workers in a factory as per given below

17^2 . 17^5 = 17^7

1, 5, 5, 9, 7, 11, 11, 15, 12, 17

15 12 17 10 ? 8 21 6

Find the median of the daily wages of ten workers from the following data: Rs 20, 25, 17, 18, 8, 15, 22, 11, 9, 14.