Question

6. The class marks of a frequency distribution are given as follows: 15, 20, 25, The class corresponding to the class mark 20 is​

Answer 1

Answer:

20 will come in the class 20-30

Step-by-step explanation:

the classes of the frequency distribution will be 10-20, 20-30etc

some may have the confusion whether 20 will come in 10-20 or 20-30 class.

So, the answer is 20 will come in 20-30 class.

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Answer 2

Given :-

Class marks of a frequency distribution => 15, 20 and 25

To find :-

Class corresponding to the class mark 20

Solution :-

Upper limit => class marks + class size/2

=> 20 + 5/2

=> 40 + 5/2

=> 45/2

=> 22.5

Lower limit => class mark – class size/2

=> 20 – 5/2

=> 35/2

=> 17.5

Final answer :-

Hence, 17.5 – 22.5 is the corresponding class to the classmark 20.