Question

Find the lower limit of a class interval with its upper limit 5 and class mark a

A) 2a-5. B) 2a+5 C) 5-a D) none of these​

Answer 1

Answer:

class mark is also known as mid point=upper limit+lower limit/2=

Class mark

Step-by-step explanation:

class mark =a

upper limit=5

let lower limit be x

5+x/2=a

Transpose 2 to RHS.IT becomes 2a.

Transpose +5 to RHS it becomes -5

2a-5=x

Option a

Answer 2

OPTION A IS RIGHT.

=2a-5