Question

if the class mark for the class 120-160 is​

Answer 1

Answer:

upper limit +lower limit /2

120+160/2

280/2

=140

Answer 2

SOLUTION

TO DETERMINE

The class mark for the class 120 - 160

CONCEPT TO BE IMPLEMENTED

Class Interval :

When the number of sample values are large in number and are in wide range, then the whole data is divided in a number of several groups according to the size of the sample. Each of these groups, made as above, is known as class interval

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

EVALUATION

Here the given class is 120 - 160

So the required class mark of the class 120 - 160

$\displaystyle \sf{ = \frac{120 + 160}{2} }$

$\displaystyle \sf{ = \frac{280}{2} }$

= 140

FINAL ANSWER

The class mark for the class 120 - 160 is 140

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