– 10, 11 – 20, 21 – 30, 31 – 40. The real lower limit of the class 21 – 30 is
A. 21
B. 30
C. 20.5
D. 21.5
Answer:C
– 10, 11 – 20, 21 – 30, 31 – 40. The real lower limit of the class 21 – 30 is
A. 21 B. 30 C. 20.5 D. 21.5