Find the mode of the following data.
20,3,7,13,3,4,6,7,19,15,7,18,3

Find the mode of the following data. 5,6,9,10,6,12,3,6,11,10,4,6,7

Find the mean deviation about the mean for the following data: 12,3,18,17,4,9,17,19,20,15,8,17,2,3,16,11,3,1,0,5 .

Find the mean deviation about the median for the following data: 3,9,5,3,12,10,18,4,7,19,21.

Find the mean deviation about the mean for the following data: 6, 7, 10, 12, 13, 4, 8, 12

Find the mode of the observations 17, 10, 13, 18, 22, 13, 26, 9, 13, 19.

Find the mode of the observations 25, 20, 16, 12, 20, 16, 19, 23, 31, 20, 11, 18, 16.

Find the number of terms in each of the following Aps, (i) 7,13,19,…….. 205 (ii) 18, 15 (1/2), 13,……. - 47 .

Find the number of terms in each of the following AP : 7,13,19,.....,205