CBSE Class 10 Maths (Standard) 2020 · Paper 30/2/1 · Question 40(a)
The mean of the following frequency distribution is 18. The frequency in the class interval is missing. Determine .
| Class interval | 11 - 13 | 13 - 15 | 15 - 17 | 17 - 19 | 19 - 21 | 21 - 23 | 23 - 25 |
|---|---|---|---|---|---|---|---|
| Frequency | 3 | 6 | 9 | 13 | f | 5 | 4 |
Answer
The missing frequency is .
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