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Question

Assertion: We find midpoints of a class interval with the following formula.
upper class limit+lower class limit2

Reason: To draw frequency polygons independently without drawing histogram it is required to have the class mark.
Which of the following is correct?


 


A
Both A and R are true and R is the correct explanation of A
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B
Both A and R are true but R is not the correct explanation of A
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C
A is true and R is false
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D
A is false and R is true
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Solution

The correct option is B Both A and R are true but R is not the correct explanation of A

A: By definition, this is true
R: By definition, this is true
To draw the frequency polygon one has to find the class mark.
Hence, R is not the correct explanation of A.


Mathematics

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