If three students with marks 26, 27 and 28 were joined, which class frequency changes?
A. 30 – 35
B. 10 – 15
C. 20 – 25
D. 25 – 30
Answer:D
If three students with marks 26, 27 and 28 were joined, which class frequency changes?
A. 30 – 35 B. 10 – 15 C. 20 – 25 D. 25 – 30