Question 12 Concentration of SO2(in ppm)Number of days (frequency)0.00−0.0440.04−0.0890.08−0.1290.12−0.1620.16−0.2040.20−0.242Total30 The above frequency distribution table represents the concentration of Sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of Sulphur dioxide in the interval 0.12−0.16 on any of these days.

Question 12 Concentration of SO2(in ppm)Number of days (frequency)0.00

1.	Question 12 Concentration of SO2(in ppm)Number of days (frequency)0.00−0.0440.04−0.0890.08−0.1290.12−0.1620.16−0.2040.20−0.242Total30 The above frequency distribution table represents the concentration of Sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of Sulphur dioxide in the interval 0.12−0.16 on any of these days.
Answer» Question 12 $\begin{matrix} C o n c e n t r a t i o n o f S O_{2} (i n p p m) & N u m b e r o f d a y s (f r e q u e n c y) 0.00 - 0.04 & 4 0.04 - 0.08 & 9 0.08 - 0.12 & 9 0.12 - 0.16 & 2 0.16 - 0.20 & 4 0.20 - 0.24 & 2 T o t a l & 30 \end{matrix}$ The above frequency distribution table represents the concentration of Sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of Sulphur dioxide in the interval 0.12−0.16 on any of these days.