If the lower limit (L1) of a class is 10 and the upper limit (L2) is 20, then the mid-point is:
A. -15
B. 10
C. 15
D. 30
Answer:C
If the lower limit (L1) of a class is 10 and the upper limit (L2) is 20, then the mid-point is:
A. -15 B. 10 C. 15 D. 30