Consider the following distribution:
Marks obtained Number of students More than or equal to $0$ $63$ More than or equal to $10$ $58$ More than or equal to $20$ $55$ More than or equal to $30$ $51$ More than or equal to $40$ $48$ More than or equal to $50$ $42$
The frequency of the class $30-40$ is:
| Marks obtained | Number of students |
| More than or equal to $0$ | $63$ |
| More than or equal to $10$ | $58$ |
| More than or equal to $20$ | $55$ |
| More than or equal to $30$ | $51$ |
| More than or equal to $40$ | $48$ |
| More than or equal to $50$ | $42$ |
The frequency of the class $30-40$ is:
- A$3$
- B$4$
- C$5$
- D$6$
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Similar Questions
The mean of the following frequency distribution is $43.75$. Find the missing frequency $f$.
Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ $50-60$ $60-70$ $70-80$ $80-90$ $90-100$ Frequency $8$ $4$ $20$ $45$ $64$ $32$ $f$ $8$ $2$ $2$
| Class | $0-10$ | $10-20$ | $20-30$ | $30-40$ | $40-50$ | $50-60$ | $60-70$ | $70-80$ | $80-90$ | $90-100$ |
| Frequency | $8$ | $4$ | $20$ | $45$ | $64$ | $32$ | $f$ | $8$ | $2$ | $2$ |
Medium
View SolutionThe mode of the following frequency distribution is $64$ and the total frequency is $200.$ Find the missing frequencies $x$ and $y.$
Class $20-30$ $30-40$ $40-50$ $50-60$ $60-70$ $70-80$ $80-90$ Frequency $8$ $12$ $27$ $x$ $55$ $37$ $y$
| Class | $20-30$ | $30-40$ | $40-50$ | $50-60$ | $60-70$ | $70-80$ | $80-90$ |
| Frequency | $8$ | $12$ | $27$ | $x$ | $55$ | $37$ | $y$ |
Medium
View SolutionIn a frequency distribution,the modal class is $70-85$ with frequency $25$. The frequencies of the classes succeeding and preceding the modal class are $20$ and $8$ respectively. Then,the values of $f_{0}, f_{1}$ and $f_{2}$ are respectively.
Medium
View SolutionThe daily income of a sample of $50$ employees is tabulated as follows:
Income (in $Rs.$) $1-200$ $201-400$ $401-600$ $601-800$ Number of employees $14$ $15$ $14$ $7$
Find the mean daily income of the employees. (in $.5$)
| Income (in $Rs.$) | $1-200$ | $201-400$ | $401-600$ | $601-800$ |
| Number of employees | $14$ | $15$ | $14$ | $7$ |
Find the mean daily income of the employees. (in $.5$)
Difficult
View SolutionFor a given frequency distribution,assumed mean $A = 25$,$\Sigma f_{i} d_{i} = 120$ and $\Sigma f_{i} = 140$. Then,the mean $\bar{x} = \dots$
Easy
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