Question

Find The Width Of The Size Of The Class Given Below
20-30,30-40,40-50.
Also find the class mark​

Answer 1

Answer:

Width of the class=Upper class limit- Lower class limit

20-30=10

30-40=10

40-50=10

Class mark= Upper class limit+ Lower class limit/2

20+30/2=25

30+40/2=35

40+50/2=45