Find the mean of the followings frequency distribution :

Find the mean of the following frequency distribution:

Find the mean of the following frequency distribution:

Find the mean of the following frequency distribution

Find the mean of the following frequency distribution:

Find the mean of the following frequency distribution:

Find the mean for the following frequency distribution

Find the mean for the following frequency distribution :

Find the mean for the following frequency distribution :

Find the mean from the following frequency distribution:

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):}