Question

the class size of interval 38 –42 is

Answer 1

Answer:

the class size of interval 38-42 is 4

Answer 2

Answer:

⇒  Let upper limit and lower limit be x and y

⇒    

2

x+y

​  

=42                   [ Given ]

∴  x+y=84                     ------ ( 1 )

Now, according to the question,

⇒  x−y=10                  ------ ( 2 )

Adding equation ( 1 ) and ( 2 ) we get,

2x=94

∴  x=47

And 47−y=10

∴  y=37

∴  Required class interval =37−47