Question

what is the class mark of class

40-50?​

Answer 1

Answer:

-10 is the answer of 40-50

Answer 2

Answer:

Class - mark =

= (Lower Class limit + Upper Class limit) / 2

= (40 + 50) / 2

= 90 / 2

= 45 .

45 is the class - mark of the class interval 40 - 50 .

Hope it helps you !