Question

To find out the concentration of So, in the air (in parts per million, i... ppm), the data
was collected for 30 localities in a certain city and is presented below:
Concentration of so, in ppm
Frequency
0.00-0.04 0.04-0.08 0.08-0.12 0.12.0.16 0.16-0.20 0.20-024
4
9
9
2
Find the mean concentration of So, in the air.​

Answer 1

Answer:

add all the numbers and divide it by the numbers of coma(,)s in your question