Question

Find the class mark of class interval 100-120

Answer 1

Answer:

class mark =( upper limit + lower limit) / 2

= 220/2

= 110 ans.

Step-by-step explanation:

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Answer 2

The class mark of the class interval 100 - 120 is 110

Given :

The class interval 100 - 120

To find :

The class mark of the class interval 100 - 120

Concept :

Class Mark :

For any grouped frequency table with class intervals, the middle value of the class limits or the class boundaries of any class is called class mark of the class

Solution :

Step 1 of 3 :

Write down the given class interval

The given class interval is 100 - 120

Step 2 of 3 :

Write down Upper Class boundary & Lower class boundary

For the given class interval 100 - 120

Upper Class boundary = 120

Lower class boundary = 100

Step 3 of 3 :

Find class mark of the class interval

The class mark of the class interval

$\displaystyle \sf{ = \frac{Upper \: Class \: boundary + Lower \: class \: boundary }{2} }$

$\displaystyle \sf{ = \frac{120 + 100}{2} }$

$\displaystyle \sf{ = \frac{220}{2} }$

$\displaystyle \sf{ = 110}$

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