(Ans. Average Marks = 23.2) 50-60 …
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(Ans. Average Marks = 23.2)
50-60
9
(Ans. Mean Age = 28.7 years)
12
40-50
30-40
15
20-30
32
10-20
30
Find out mean age by Direct Method.
4 Statistics for Economics
7. Average age of the people of a country is shown in the following table:
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