In a frequency distribution, the mid-value of a class is 20 and the width of the class is 8.then what is the lower limit ?

Mid value (a) = 20

Width (h) = 8

**Lower limit = a - h/2**

**= 20 - 8/2**

**= 20 - 4**

**= 16**

Upper limit = a + h/2

= 20 + 8/2

= 20 + 4

= 24

Thus, the class limit = 16 - 24.

Also, a - h/2 and a + h/2 is the formula for finding out the lower and upper limit when class mark i.e mid value and class interval or width is given where a = mid value and h = width..

Hope u get it !!

:) :)