Question

what is the class mark of the class20 - 25​

Answer 1

Answer:

22.5 is class mark.

Step-by-step explanation:

first term=20

last term=25

class mark = (first term + second term)/2

(20+25)/2

45/2

= 22.5

Answer 2

class mark =upper limit+ lower limit/2

20+25/2

45/2

22.5