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 $\mathrm{SO}_2$
|
$0.00 - 0.04$
|
$0.04 - 0.08$
|
$0.08 - 0.12$
|
$0.12 - 0.16$
|
$0.16 - 0.20$
|
$0.20 - 0.24$
|
|
No. of days
|
$4$
|
$8$
|
$9$
|
$2$
|
$4$
|
$3$
|
