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| ઉંમર | $15$ | $16$ | $17$ | $18$ | $19$ | $20$ |
| વિદ્યાર્થીઓની સંખ્યા | $5$ | $8$ | $5$ | $12$ | $X$ | $Y$ |
| $\text{ગુણ}$ | $10$ | $15$ | $20$ | $25$ | $30$ |
| $\text{વિદ્યાર્થીઓની સંખ્યા}$ | $2$ | $4$ | $6$ | $8$ | $5$ |
| $x_i$ | $3$ | $6$ | $9$ | $12$ | $13$ | $15$ | $21$ | $22$ |
| $f_i$ | $3$ | $4$ | $5$ | $2$ | $4$ | $5$ | $4$ | $3$ |
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