| $\text{अंक}$ | $10$ | $15$ | $20$ | $25$ | $30$ |
| $\text{छात्रों की संख्या}$ | $2$ | $4$ | $6$ | $8$ | $5$ |
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| $x_i$ | $10$ | $30$ | $50$ | $70$ | $90$ |
| $f_i$ | $4$ | $24$ | $28$ | $16$ | $8$ |
| $x_i$ | $5$ | $10$ | $15$ | $20$ | $25$ |
| $f_i$ | $7$ | $4$ | $6$ | $3$ | $5$ |
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