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The mean of following frequency distribution is 50, but the frequencies f_1 and f_2 in classes (20–40) and (60–80) respectively are not known. Find these frequencies, if the sum of all the frequencies is 120.
 
Class Frequency
0-20 17
20-40 f_1
40-60 32
60-80 f_2
80-100 19
 
 
Answer:
 
The value of f_1 is .
 
The value of f_2 is .
 
[Note: Enter the answer in to two decimal number.]