Question

The class marks of a frequency distribution are
are 15, 20, 25... find the class corresponding
to the class mark 20
​

Answer 1

Answer:

the class corresponding

to the class mark 5

Answer 2

Step-by-step explanation:

15,20,25,...

Lower limit of class 20 is mean of 15 and 20=215+20=17.5

Upper limit of class 20 is the mean of 20 and 25=220+25=22.5

20 is the class mark for the class interval 17.5−22.5