The class corresponding to the class mark 20 is :
A. 12.5 - 17.5
B. 17.5 - 22.5
C. 18.5 - 21.5
D. 19.5 - 20.5
Answer:B
The class corresponding to the class mark 20 is :
A. 12.5 - 17.5 B. 17.5 - 22.5 C. 18.5 - 21.5 D. 19.5 - 20.5