Question

the class mark of a particular class is 6.5 & its class size is 3 . write the next 3 classes , if they continuous .​

Answer 1

the next three classes are 8-11,11-14 ,14-17

Answer 2

Answer:

5−8

Step-by-step explanation:

Let the a be the lower limit of the class interval

Class size of the class interval =3

∴ Upper limit of the class interval=a+3

Class mark=6.5

∴  

2

a+a+3

​

=6.5

⇒2a+3=6,5×2

⇒2a=13−3

⇒2a=10⇒a=  

2

10

​

=5

∴a+3=5+3=8

Hence class interval= 5−8