The class marks of a frequency distribution are given as follows: $15, 20, 25, . . .$
The class corresponding to the class mark $20$ is:

12.5, 17.5

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17.5, 22.5

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18.5, 21.5

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19.5, 20.5

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Solution

The correct option is A $17.5, 22.5$
Class marks are: $15, 20, 25, . . .$
Lower limit of class $20$ is mean of $15$ and $20 = \frac{15 + 20}{2} = 17.5$
Upper limit of class $20$ is the mean of $20$ and $25 = \frac{20 + 25}{2} = 22.5$
$20$ is the class mark for the class interval $17.5 - 22.5$

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Similar questions

Q. The class marks of a frequency distribution are given as follows : 15, 20, 25, ........ .The class corresponding to the class mark 20 is _________.

Q. If the class marks in a frequency distribution are 19.5, 26.5, 33.5, 40.5, then the class corresponding to the class mark 33.5 is :

Q. The class marks of a frequency distribution are 15, 20, 25, 30, .. . The class corresponding to the class marks 20 is
(a) 12.5−17.5
(b) 17.5−22.5
(c) 18.5−21.5
(d) 19.5−20.5

Q. Question 6
The class marks of a frequency distribution are given as follows 15, 20, 25….. the class corresponding to the classmark 20 is:

A) 12.5 - 17.5
B) 17.5 - 22.5
C) 18.5 - 21.5
D) 19.5 - 20.5

(i) Find the class mark of the class 90-120.
(ii) In a frequency distribution, the mid-value of the class is 10 and width of the class is 6. Find the lower limit of the class.
(iii) The width of each of five continuous classes in a frequency distribution is 5 and lower class limit of the lowest class is 10. What is the upper class limit of the highest class?
(iv) The class marks of a frequency distribution are 15, 20, 25, .... Find the class corresponding to the class mark 20.
(v) In the class intervals 10-20, 20-30, find the class in which 20 is included.

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The class marks of a frequency distribution are given as follows: 15,20,25,...The class corresponding to the class mark 20 is:

The correct option is A 17.5,22.5Class marks are: 15,20,25,...Lower limit of class 20 is mean of 15 and 20=15+202=17.5Upper limit of class 20 is the mean of 20 and 25=20+252=22.520 is the class mark for the class interval 17.5−22.5

The class marks of a frequency distribution are given as follows: $15, 20, 25, . . .$
The class corresponding to the class mark $20$ is:

The correct option is A $17.5, 22.5$
Class marks are: $15, 20, 25, . . .$
Lower limit of class $20$ is mean of $15$ and $20 = \frac{15 + 20}{2} = 17.5$
Upper limit of class $20$ is the mean of $20$ and $25 = \frac{20 + 25}{2} = 22.5$
$20$ is the class mark for the class interval $17.5 - 22.5$