CBSE Class 10 Maths (Standard) 2019 · Paper 30(B) · Question 29
If the mean of the following frequency distribution is , find the missing frequencies and , if the sum of all frequencies is :
| Classes | 0 - 80 | 80 - 160 | 160 - 240 | 240 - 320 | 320 - 400 |
|---|---|---|---|---|---|
| Frequencies | 20 | 25 | x | y | 10 |
Answer
and .
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