Question

Find the class mark of the class (i) 10-25 (ii) 15-35 (iii) 20-40(iv)15.5-18.5 (v) 50-75​

Answer 1

Step-by-step explanation:

firstly... lower term +upper term /2

(i) 10+25/2=17.2

(ii)15+35/2=25

(iii)20+40/2=30

(iv)15.5+18.5/2=17

(v)50+75/2=62.5

it is the class marks of the class intervals