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For a particular year, following is the distribution of ages (in hours) of primary school teachers in a particular state.
Age (in years)
No. of teachers
Less than 20
11
21–25
32
26–30
51
31–35
49
36–40
27
41–45
6
46–50
4
1. Determine the class limits of the fourth class.2. What is the class size?3. Construct a cumulative frequency table.
