Question
Given below is the frequency distribution table regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days.
Find the probability of the concentration of sulphur dioxide in the interval 0.12 - 0.16 on any of these days.
|
Concentration of $SO_2$
|
0.00 - 0.04
|
0.04 - 0.08
|
0.08 - 0.12
|
0.12 - 0.16
|
0.16 - 0.20
|
0.20 - 0.24
|
|
No. of days
|
4
|
8
|
9
|
2
|
4
|
3
|
