Answer:
Class width=20
Lower class limit of first class=100
Upper class limit of first class=120
Step-by-step explanation:
The class width can be calculated by taking the difference of two consecutive upper class limits or lower class limits.
Now we take any two consecutive upper class limits or lower class limits from classes 100-120,120-140,140-160,160-180,180-200,200-220,220-240.
We take upper class limits of first and second class i.e. 100 and 120.
Class width=120-100=20
Class width=20
The approximate lower and upper class limits of the first class from classes 100-120,120-140,140-160,160-180,180-200,200-220,220-240 are 100 and 120.
Class limits for first class is 100-120.
Lower class limit of first class=100
Upper class limit of first class=120
