Chapter 13 Question 7th, Exercise 13.1 Class 10th

Описание: Chapter 13 Question 7th, Exercise 13.1 Class 10th

To find out the concentration of SO2
in the air (in parts per million, i.e., ppm), the data
was collected for 30 localities in a certain city and is presented below:
Concentration of SO2
(in ppm) Frequency
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
Find the mean concentration of SO2
in the air.