Calculate average of the following discrete series. Use Short-cut Method by taking 25 as assmed average.
`{:("Size",30,29,28,27,26,25,24,23,22,21),("Frequency (f)",2,4,5,3,2,7,1,4,5,7):}`

Calculate mode from the following series : {:("Size",1,2,3,4,5,6,7,8,9,10,),("Frequency",8,6,10,12,20,12,5,3,2,4,):}

The mean deviation about the mean of the following distribution is {:("Size",20,21,22,23,24),("Frequency",6,4,5,1,4):}

The mean deviation about the mean of the following distribution is {:("Size",20,21,22,23,24),("Frequency",6,4,5,1,4):}

The mean deviation about the mean of the following distribution is {:("Size",20,21,22,23,24),("Frequency",6,4,5,1,4):}

The mean deviation about the mean of the following distribution is {:("Size",20,21,22,23,24),("Frequency",6,4,5,1,4):}

R={(2,1),(2,2),(2,3),(2,4)}

Construct index number by Price Relative Method taking 2004 as base year. {:("Year","A","B","C","D"),(2004,25,18,16,21),(2016,20,22,24,22),(2017,25,20,25,25),(2018,28,24,30,26):}

Form a grouped frequency distribution from the following data by inclusive method taking 4 as the magnitude of class intervals. 31,23,19,29,22,20,16,10,13,34 38,33,28,21,15,18,36,24,18,15 12,30,27,23,20,17,14,32,26,25 18,29,24,19,16,11,22,15,17,10

Form a grouped frequency distribution from the following data by inclusive method taking 4 as the magnitude of class intervals. 31,23,19,29,22,20,16,10,13,34 38,33,28,21,15,18,36,24,18,15 12,30,27,23,20,17,14,32,26,25 18,29,24,19,16,11,22,15,17,10

Form a grouped frequency distribution from the following data by inclusive method taking 4 as the class size of class intervals. 31, 23, 19, 29, 22, 20, 16, 10, 13, 34, 38, 33, 28, 21, 15, 18, 36, 24, 18, 15, 12, 30, 27, 23, 20, 17, 14, 32, 26, 25, 18, 29, 24, 19, 16, 11, 22, 15, 17,10