Question

the classes which are in the form of 30-40,40-50,50-60......are called which classes ​

Answer 1

Answer:

Class intervals frequency more than type

cumulative frequency

0-10 2 50

10-20 12 50-2=48

20-30 22 50-2-12=36

30-40 8 50-2-12-22=14

40-50 6 50-2-12-22-8=6