Question

the mind value of a class interval is 14 and lower limit is 9.5. find the upper limit

Answer 1

Mid-Value = $\frac{Lower Limit + Upper Limit}{2}$

Now putting the values, 
we get,

14 = $\frac{9.5 + Upper Limit}{2}$

14×2 = 9.5 + Upper Limit

Upper Limit = 28 - 9.5
Upper limit = 18.5 (Answer)

Answer 2

Lower limit = L = 9.5
Upper limit  = U
Mid point = M =  ( U+L ) / 2
 M = 14  =( U+9.5)/2
             U + 9.5 = 2*14 =28          U = 18.5