Question

the class mark of interval 15-30 is​

Answer 1

Answer:

17.5

Step-by-step explanation:

class mark =x

lower limit=15

upper limit=30

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

x=(15+30)/2

=22.5

Answer 2

Answer:

The answer is 22.5

Explanation:

• In the following question we have to find the class mark between 15 and 30.
• Class mark is defined as the average of the upper limit and the lower limit of a class in a frequency distribution.

                         Upper limit + Lower limit/ 2

On the other hand,

• Class interval refers to the numerical width of any class in a particular distribution.

                    Class interval = Upper Limit - Lower Limit

• In Mathematics, Class interval is defined as the difference between the upper and lower-class limits.

Therefore, the solution is as follows:

• Let the class mark be x

• The lower limit =15

• The upper limit=30

            Therefore,

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

• x=(15+30)/2
• x=45/2
• Therefore, the class mark is  22.5

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