If $M = 72$ and $\bar{x} = 70$,then $Z = \ldots \ldots \ldots \ldots$
- A$74$
- B$76$
- C$68$
- D$75$
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Similar Questions
The percentage of marks obtained by $100$ students in an examination are given below:
Marks $30-35$ $35-40$ $40-45$ $45-50$ $50-55$ $55-60$ $60-65$ Frequency $14$ $16$ $18$ $23$ $18$ $8$ $3$
Determine the median percentage of marks.
| Marks | $30-35$ | $35-40$ | $40-45$ | $45-50$ | $50-55$ | $55-60$ | $60-65$ |
| Frequency | $14$ | $16$ | $18$ | $23$ | $18$ | $8$ | $3$ |
Determine the median percentage of marks.
Medium
View SolutionFind the mode of the following frequency distribution:
Class $0-100$ $100-200$ $200-300$ $300-400$ $400-500$ $500-600$ Frequency $7$ $21$ $37$ $13$ $12$ $10$
| Class | $0-100$ | $100-200$ | $200-300$ | $300-400$ | $400-500$ | $500-600$ |
|---|---|---|---|---|---|---|
| Frequency | $7$ | $21$ | $37$ | $13$ | $12$ | $10$ |
Medium
View SolutionFind the mean,median,and mode of the following frequency distribution:
Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ Frequency $5$ $27$ $58$ $20$ $10$
| Class | $0-10$ | $10-20$ | $20-30$ | $30-40$ | $40-50$ |
|---|---|---|---|---|---|
| Frequency | $5$ | $27$ | $58$ | $20$ | $10$ |
Medium
View SolutionDaily wages of $110$ workers,obtained in a survey,are tabulated below:
Daily wages (in $Rs.$) Number of workers $100-120$ $10$ $120-140$ $15$ $140-160$ $20$ $160-180$ $22$ $180-200$ $18$ $200-220$ $12$ $220-240$ $13$
Compute the mean daily wages of these workers (in $Rs.$).
| Daily wages (in $Rs.$) | Number of workers |
| $100-120$ | $10$ |
| $120-140$ | $15$ |
| $140-160$ | $20$ |
| $160-180$ | $22$ |
| $180-200$ | $18$ |
| $200-220$ | $12$ |
| $220-240$ | $13$ |
Compute the mean daily wages of these workers (in $Rs.$).
Difficult
View SolutionThe mean of the following data is $55.5$ and the total frequency is $20$. Find the missing frequencies $x$ and $y$.
Class $30-40$ $40-50$ $50-60$ $60-70$ $70-80$ Frequency $3$ $x$ $7$ $7$ $y$
| Class | $30-40$ | $40-50$ | $50-60$ | $60-70$ | $70-80$ |
| Frequency | $3$ | $x$ | $7$ | $7$ | $y$ |
Medium
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