| $C$.$I$. | $75$-$175$ | $175$-$275$ | $275$-$375$ | $375$-$475$ | $475$-$575$ | $575$-$675$ | $675$-$775$ |
| $f_i$ | $3$ | $2$ | $1$ | $0$ | $1$ | $2$ | $3$ |
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| वर्ग अंतराल | $0$-$5$ | $5$-$10$ | $10$-$15$ | $15$-$20$ | $20$-$25$ |
|---|---|---|---|---|---|
| आवृत्ति | $4$ | $1$ | $10$ | $3$ | $2$ |
| $x_i$ | $6$ | $10$ | $14$ | $18$ | $24$ | $28$ | $30$ |
| $f_i$ | $2$ | $4$ | $7$ | $12$ | $8$ | $4$ | $3$ |
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