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Class mark of a particular class is 9.5 and the class size is 6, then the class interval is
  • a)
    3.5-15.5
  • b)
    12.5-18.5
  • c)
    15.5-27.5
  • d)
    6.5-12.5
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Class mark of a particular class is 9.5 and the class size is 6, then ...
To determine the class interval, we need to know the range of the data and the number of class intervals.

In this case, the class mark is given as 9.5 and the class size is 6. The class mark represents the midpoint of the class interval, which means that the lower limit of the class interval is 9.5 - 0.5 = 9 and the upper limit is 9.5 + 0.5 = 10.

Let's calculate the range of the data:
Range = Upper Limit - Lower Limit
Range = 10 - 9
Range = 1

Since the range is 1 and there are 6 class intervals, we can divide the range by the number of class intervals to determine the class interval size:
Class Interval Size = Range / Number of Class Intervals
Class Interval Size = 1 / 6
Class Interval Size = 0.1667

Now, we can determine the class intervals:
First Class Interval: 9 - 9.1667
Second Class Interval: 9.1667 - 9.3333
Third Class Interval: 9.3333 - 9.5
Fourth Class Interval: 9.5 - 9.6667
Fifth Class Interval: 9.6667 - 9.8333
Sixth Class Interval: 9.8333 - 10

As we can see, the class interval that includes the class mark of 9.5 is 9.5 - 9.6667. Therefore, the correct answer is option D) 6.5-12.5.

It is important to note that the other options given are incorrect because they do not include the class mark of 9.5 within the range of the class intervals.
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Community Answer
Class mark of a particular class is 9.5 and the class size is 6, then ...
The correct option is D) 6.5 - 12.5
Class Mark = 9.5
Upper limit of the class = Class Mark + Class Size/2
Lower limit of the class = Class Mark - Class Size/2
Hence, the class interval 6.5 - 9.5
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Class mark of a particular class is 9.5 and the class size is 6, then the class interval isa)3.5-15.5b)12.5-18.5c)15.5-27.5d)6.5-12.5Correct answer is option 'D'. Can you explain this answer?
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Class mark of a particular class is 9.5 and the class size is 6, then the class interval isa)3.5-15.5b)12.5-18.5c)15.5-27.5d)6.5-12.5Correct answer is option 'D'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Class mark of a particular class is 9.5 and the class size is 6, then the class interval isa)3.5-15.5b)12.5-18.5c)15.5-27.5d)6.5-12.5Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Class mark of a particular class is 9.5 and the class size is 6, then the class interval isa)3.5-15.5b)12.5-18.5c)15.5-27.5d)6.5-12.5Correct answer is option 'D'. Can you explain this answer?.
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