Question

calculate the class mark for the class interval (250-300)


step by step explanation please​

Answer 1

The classmark for the class is 275

Step-by-step explanation:

Given:

class interval is 250-300

To find:

class mark

Formula:

Classmark= upper limit + lower limit

                                   2

Solution:

The class interval is 250-300

For any given class the upper limit or boundary is the number from where the interval starts,

whereas the lower limit is the end of the interval

Thus, here upper limit of the class is 250 & lower limit is 300

Using the formula,

Classmark= upper limit + lower limit

                                   2

∴ Classmark = $\frac{250+300}{2}$

∴ Classmark = $\frac{550}{2}$

∴ Classmark = 275

Classmark is used to find the mean of any given data, it is the mid value of any class interval

The classmark for the class 250-300 is 275

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