| वर्ग अंतराल | $0-5$ | $5-10$ | $10-15$ | $15-20$ | $20-25$ |
| बारंबारता | $4$ | $1$ | $10$ | $3$ | $2$ |
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| $x_i$ | $5$ | $7$ | $9$ | $11$ |
|---|---|---|---|---|
| $f_i$ | $3$ | $2$ | $1$ | $2$ |
| विषय | गणित,भौतिकी,रसायन विज्ञान |
| माध्य | $42, 32, 40.9$ |
| मानक विचलन | $12, 15, 20$ |
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