question_answer

The mean of the following frequency table is 50. But the frequencies \[{{f}_{1}}\] and \[{{f}_{2}}\] in class 20 - 40 and 60 - 80 are missing. Find the missing frequencies

Class Interval	0-20	20-40	40-60	60-80	80-100	Total
Frequency	17	\[{{f}_{1}}\]	32	\[{{f}_{2}}\]	19	120

A)  \[28,\,\,24\]

B)  \[26,\,\,24\]

C)  \[27,\,\,20\]                  

D)  \[30,\,\,28\]

E)  None of these