The mean of the following distribution is 50 but the frequency `f_(1) and f_(2)` in classes 20-40 and 60-80, resepectively are not known. Find these frequencies, if the sum of all the fequencies is 120

The mean of the following frequency table is 50, but the frequency f_1 and f_2 in classes 20 - 40 and 60 -80 respectively are not known. Find these frequencies.

The mean of the following frequency distribution is 50, but the frequencies f_1 and f_2 in class 20-40 and 60-80 respectively are not known. Find these frequencies. Given that the sum of frequencies is 120.

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

The maen of the following frequency table is 53. But the frequencies f_(1) and f_(2) in the classes 20-40 and 60-80 are missing. Find the missing frequencies.

The mean of the following distribution is 52 and the frequency of class interval 30-40 is f. Find f.

The mean of the following frequency distribution is 50. Find the value of f:

The mean of the following frequency distribution is 21 1/7 . Find the value of f

If the mean of the following frequency distribution is 188. Find the missing frequencies f_1 x and f_2

The mean of the following frequency distribution is 50 Find f1 f2 f3 if f2 : f3 = 4 : 3:

If the mean of the following frequency distribution is 26.7, find the missing frequency f: