For a given frequency distribution,$\Sigma f_{i} x_{i} = 1790$ and $\Sigma f_{i} = 50$. Then,the mean $\bar{x} = $ ..........
- A$17.8$
- B$35.8$
- C$17.4$
- D$34.8$
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Similar Questions
Find the mean of the following data by all the three methods:
Class $50-70$ $70-90$ $90-110$ $110-130$ $130-150$ $150-170$ Frequency $10$ $18$ $7$ $6$ $5$ $4$
| Class | $50-70$ | $70-90$ | $90-110$ | $110-130$ | $130-150$ | $150-170$ |
| Frequency | $10$ | $18$ | $7$ | $6$ | $5$ | $4$ |
Medium
View SolutionThe two types of Ogives drawn for a frequency distribution intersect at point $(20, 25)$. Then,the median of the data is .......
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View SolutionThe mean and median of a frequency distribution are $72.5$ and $73.9$ respectively. Then,the mode of the data is $\ldots \ldots \ldots . . .$
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View SolutionThe mean of the following frequency distribution is $28.5$ and the total frequency is $60$. Find the missing frequencies $f_{1}$ and $f_{2}$.
Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ $50-60$ Frequency $6$ $f_1$ $20$ $15$ $f_2$ $4$
| Class | $0-10$ | $10-20$ | $20-30$ | $30-40$ | $40-50$ | $50-60$ |
| Frequency | $6$ | $f_1$ | $20$ | $15$ | $f_2$ | $4$ |
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View Solution$\frac{Z-M}{M-\bar{x}}=\ldots \ldots \ldots \ldots$
Easy
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