Question

the class mark of a particular class is 6.5 and the class size is 3, then class interval is

Answer 1

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

∴

{a+a+3}/{2}

=6.5

⇒2a+3=6,5×2

⇒2a=13−3

⇒2a=10⇒a=

$\frac{10}{2}$

=5

∴a+3=5+3=8

Hence class interval= 5−8

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