Question

find the class mark of the classes 10-25 and 45-65.​

Answer 1

Answer:

Upper limit + lower limit = class mark

Step-by-step explanation:

(I) 10+25\2 = 17.5

(ii) 45+65\2 = 77.5

Hope it helps!!!!!

Answer 2

Given:

We have intervals of  10-25 and 45-65.​

To Find:

We need to find class mark.

Step-by-step explanation:

• Class mark of any interval is given by the formula

                      $class -mark=x_i=\frac{lower limit+upper limit}{2}$

• Thus class mark of 10-25 is given by

                   [tex]class -mark=x_i=\frac{10+25}{2}=\frac{35}{2} =17. 5\\\\ [/tex]    

• Thus class mark of 45-65 is given by

                   [tex]class -mark=x_i=\frac{45+65}{2}=\frac{110}{2} =55\\\\ [/tex]

Thus, class amrk will be 17.5,55.