In the formula $M = l + \frac{(\frac{n}{2} - cf)}{f} \times h$ for the median,$l = \ldots \ldots \ldots$
- ACumulative frequency of the class preceding the median class
- BLower limit of the median class
- CFrequency of the median class
- DTotal frequency
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Find the mean of the following data:
Class $200-299$ $300-399$ $400-499$ $500-599$ $600-699$ $700-799$ $800-899$ Frequency $3$ $61$ $118$ $139$ $126$ $151$ $2$
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| Frequency | $3$ | $61$ | $118$ | $139$ | $126$ | $151$ | $2$ |
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Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ Frequency $7$ $16$ $25$ $32$ $20$
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