Jee Main
Statistics
JEE Main 2023 (Online) 10th April Morning Shift
INTEGER+4 / -12023
If the mean of the frequency distribution
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| Class : | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
|---|---|---|---|---|---|
| Frequency : | 2 | 3 | \(x\) | 5 | 4 |
is 28, then its variance is __________.