# Calculate the Mean of the Following Distribution : 0-10 10-20 20-30 30-40 40-50 50-60 - Mathematics

Calculate the mean of the following distribution :

 Class Interval 0-10 10-20 20-30 30-40 40-50 50-60 Frequency 8 5 12 35 24 16

#### Solution

Consider the following distribution:

 Class Interval Frequency (f) Classmark (x) fx 0 – 10 8 5 40 10 – 20 5 15 75 20 – 30 12 25 300 30 – 40 35 35 1225 40 – 50 24 45 1080 50 – 60 16 55 880 Total n = sum f = 100 sum fx = 3600

Mean = (sum fx)/n = 3600/100 = 36

Concept: Concept of Median
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