The histogram showing the weekly wages (in rupees) of workers in a factory is given alongside.
Answer the following about the frequency distribution:
(i) What is the frequency of the class 400-425?
(ii) What is the class having minimum frequency?
(iii) What is the cumulative frequency of the class 425 – 450?
(iv) Construct a frequency and cumulative frequency table for the given distribution.
Solution:
(i) The frequency of the class 400-425 is 18.
(ii) The class having minimum frequency is 475-500.
(iii) The cumulative frequency of the class 425-450 is (6 + 18 + 10) = 34.
(iv) The frequency table for the given distribution is:
| Classes | Frequency | Cumulative Frequency |
| 375-400 | 6 | 6 |
| 400-425 | 18 | 24 |
| 425-450 | 10 | 34 |
| 450-475 | 20 | 54 |
| 475-500 | 4 | 58 |
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