Class marks of a distribution are $47, 52, 57, 62, 72, 77$ , and $82$ the third class interval from the end is

67.5 - 76.5

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69 - 75

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69.5 - 74.5

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none of above

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Solution

The correct option is C $69.5 - 74.5$
Class size = $5$ Class marks of $3$ rd interval from end is $72$ third class from end is $72 - 2.5 t o 72 + 2.5$ $\Rightarrow 69.5 - 74.5$

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Similar questions

Q. Marks of students of class VIII-B are distributed in the grouped frequency distribution table given below.

Class intervals (Marks)	Number of Students
0 - 20	25
20 - 30	35
30 - 60	27
60 - 75	13
75 - 82	24
82 - 94	12
94 - 100	4

What is the length of the bar in the histogram for the 5th class interval ?

Class marks of a distribution are 26, 31, 36, 41, 46, 51, 61, 66, 71. The lower and upper class limits of the first class interval are

The marks obtained by 25 students in a class are as follows

22, 28, 30, 32, 35, 37, 40, 41, 43, 44, 45, 45, 48, 49, 52, 53, 54, 56, 56, 58, 60, 62, 65, 68, 69

(i) Arrange the above data on frequency distribution taking class interval.

20-29, 30-39, 40-49, 50-59, 60-69

(ii) Form the cumulative frequency distribution.

Q. The class marks of a distribution are

62, 67, 72, 77, 82

and

87

. Find the class-size and class-limits.

The class size of a distribution is 25 and the first class- interval is 200- 224. There are seven class - intervals.
(i) Write the class - intervals.
(ii) Write the class - marks of each interval.

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Class marks of a distribution are 47,52,57,62,72,77, and 82 the third class interval from the end is

The correct option is C 69.5−74.5Class size =5 Class marks of 3rd interval from end is 72 third class from end is 72−2.5 to 72+2.5 ⇒69.5−74.5

Class marks of a distribution are $47, 52, 57, 62, 72, 77$ , and $82$ the third class interval from the end is

The correct option is C $69.5 - 74.5$
Class size = $5$ Class marks of $3$ rd interval from end is $72$ third class from end is $72 - 2.5 t o 72 + 2.5$ $\Rightarrow 69.5 - 74.5$