The mean of the following frequency distribution is 63.3 and the sum of all the frequencies is 50 compute the missing freqiencies f1 and f2
class 0-20,20-40,40-60,60-80,80-100,100-120
frequency 5 ,f1 ,10 ,f2 , 7 ,8
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- Sum of frequency = 50
- f1 and f2
We know that,
Sum of frequency is 50.
Subtract
And also we know that
mean is 62.8
Subtract equation (1) from equation (2)
Put value of f2 in equation (1)
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