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The class mark of the class 15.5 - 20.5
- a)15.5
- b)20.5
- c)18
- d)5
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
The class mark of the class 15.5 - 20.5a)15.5b)20.5c)18d)5Correct answ...
**Explanation:**
To find the class mark of a class interval, we need to find the average of the lower class limit and the upper class limit.
In this case, the class interval is 15.5 - 20.5.
- The lower class limit is 15.5.
- The upper class limit is 20.5.
**Calculating the class mark:**
To find the class mark, we add the lower class limit and the upper class limit and divide the sum by 2.
Class mark = (Lower class limit + Upper class limit) / 2
Class mark = (15.5 + 20.5) / 2
Class mark = 36 / 2
Class mark = 18
Therefore, the class mark of the class interval 15.5 - 20.5 is 18.
**Explanation of options:**
a) 15.5: This is the lower class limit, not the class mark.
b) 20.5: This is the upper class limit, not the class mark.
c) 18: This is the correct answer. It is calculated by finding the average of the lower class limit and the upper class limit.
d) 5: This is not relevant to the given class interval.
Therefore, the correct answer is option 'C' which represents the class mark of the class interval 15.5 - 20.5.
To find the class mark of a class interval, we need to find the average of the lower class limit and the upper class limit.
In this case, the class interval is 15.5 - 20.5.
- The lower class limit is 15.5.
- The upper class limit is 20.5.
**Calculating the class mark:**
To find the class mark, we add the lower class limit and the upper class limit and divide the sum by 2.
Class mark = (Lower class limit + Upper class limit) / 2
Class mark = (15.5 + 20.5) / 2
Class mark = 36 / 2
Class mark = 18
Therefore, the class mark of the class interval 15.5 - 20.5 is 18.
**Explanation of options:**
a) 15.5: This is the lower class limit, not the class mark.
b) 20.5: This is the upper class limit, not the class mark.
c) 18: This is the correct answer. It is calculated by finding the average of the lower class limit and the upper class limit.
d) 5: This is not relevant to the given class interval.
Therefore, the correct answer is option 'C' which represents the class mark of the class interval 15.5 - 20.5.
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Community Answer
The class mark of the class 15.5 - 20.5a)15.5b)20.5c)18d)5Correct answ...
Class mark = (15.5 20.5) /2 = 36/2 = 18 So , option (c) is correct
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