If the arithmetic mean of the following series is `115.86,` find the missing value.
`{:("Wages(Rs.)",110,112,113,117,?,125,128,130),("Number of Workers",25,17,13,15,14,8,6,2):}`

In the following frequency distribution, if the arithmetic mean is 45.6, find out missing frequency. {:("Wages(Rs.)",10-20,20-30,30-40,40-50,50-60,60-70,70-80),("Number of Workers"," "5," "6," "7," "X," "4," "3," "9):}

The arithmetic mean of the following data is 14. Find the value of k x_i : 5 10 15 20 25 f_i : 7 k 8 4 5

The arithmetic mean of the following data is 14. Find the value of k x_i : 5 10 15 20 25 f_i : 7 k 8 4 5

The arithmetic mean of the following data is 25, find the value of k . x_i : 5 15 25 35 45 f_i : 3 k 3 6 2

The arithmetic mean of the following data is 25, find the value of k . x_i : 5 15 25 35 45 f_i : 3 k 3 6 2

Find out median of the following series : {:("Wage Rate (Rs.)",25-30,20-25,15-20,10-15,5-10,0-5),("Number of Workers"," "5," "10," "20," "5," "8," "2):}

In the following frequency distribution, the frequency of the class interval (40-50) is not known. Find it, if the arithmetic mean of the distribution is 52. {:("Wages(Rs.)",10-20,20-30,30-40,40-50,50-60,60-70,70-80),("Number of Workes"," "5," "3," "4," "?," "2," "6," "13):}

Find out mode of the following series : {:("Income (Rs.)",110,120,130,140,150,160),("Nunber of Persons"," "2," "4," "8," "10," "5," "4):}