Question

Find the class – marks of the classes 10-25 and 35-66.​

Answer 1

Answer:

:

Answer:

class mark of (10-25) = 17.5

and

class mark of (35-55)=45

Step-by-step explanation:

Given class intervals 10-25,

35 -55

\* We know that,

*\

Now ,

i) Class interval (10-25)

lower limit = 10 ,

upper limit = 25

ii ) class interval (35-55)

lower limit = 35 ,

,upper limit = 55

Therefore,

class mark of (10-25) = 17.5

Answer 2

Classmate of $(10-25)=17.5$

Classmate of $(35-66)=50.5$

Given-The given classes $10-25$ and $25-66$

Find the class mark of the classes.

Solution -The class mark is also known as the midpoint of the class interval in a frequency distribution. It can be defined as the average of the upper limit and the lower limit of a class.

we know that,

class mark $(x)$$=\frac{lower limit+upper limit}{2}$

Now,

Class interval is $(10-25)$

lower limit is $10$ upper limit is $25$

class mark of $10-25$ is $\frac{10+25}{2}=\frac{35}{2} =17.5$

and now

class interval is $(35-66)$

lower limit is $35$ upper limit is $66$

class mark of $35-66$ is $\frac{35+66}{2}=\frac{101}{2}=50.5$

Hence,

Class mark of $(10-25)=17.5$

class mark of $(35-66)=50.5$

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