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[" 40.The mean of the following frequency distribution is "18." The frequency "f" in "],[" the class interval "19-21" is missing.Determine "f" ."],[" Class interval "11-13" 13- "15" 15-17"17-19" 19-21"21-23" 23-25"],[" Frequency "3,60|9],[hline]

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The mean of the following distribution is 18. Find the frequency f of the class 19-21 .

The mean of the following distribution is 18. Find the frequency fof the class 19-21

The mean of the following distribution is 18. The frequency f in the class interval 19-21 is missing {:("Class ",11-13,13-15,15-17,17-19,19-21,21-23,23-25),("Frequency "," "3," "6," "9," "13," "f," "5," "4):} Determine f .

Find the mean of the following frequency distribution: Classes: 0-20 20-40 40-60 60-80 80-100 Frequency: 15 18 21 29 17

Find the mean of the following frequency distribution: Classes: 0-20 20-40 40-60 60-80 80-100 Frequency: 15 18 21 29 17

Find the mean of the following frequency distribution: Classes: 0-20 20-40 40-60 60-80 80-100 Frequency: 15 18 21 29 17

Find the mean of the following frequency distribution : {:("Class ",0-20,20-40,40-60,60-80,80-100),("Frequency "," "15," "18," "21," "29," "17):}

Find the mean of the following frequency distribution. {:("Classes :",0-20,20-40,40-60,60-80,80-100,),("Frequency :"," 15"," 18"," 21"," 29 "," 17",):}

The mid-values of the class-intervals of a frequency distribution are respectively 11,14,17,20…… The class interval of which the mid-value is 17 is

In the following frequency distribution : {:(x,0,1,3,5,6,8,10),(f,2,6,7,21,19,15,3):} The mode is