UPSKILL MATH PLUS
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Construct a cumulative frequency distribution of less than type for the following data.
| Class interval | Cumulative frequency |
| More than or equal to 20 | 61 |
| More than or equal to 40 | 49 |
| More than or equal to 60 | 40 |
| More than or equal to 80 | 24 |
| More than or equal to 100 | 14 |
| More than or equal to 120 | 13 |
Answer:
| Class interval | Frequency |
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