Find the mean daily expenditure on food by a suitable MIU

To find out the concentration of so, in the air (in parts per million, i.e., ppm), the data

Direct

was collected for 30 localities in a certain city and is presented below:

0.16-0.20 0.20-0.24

Concentration of So, in ppm

0.00-0.04 0.04-0.08 0.08-0.12 0.12-0.16

4

2.

9

4

9

Frequency

Find the mean concentration of So, in the air.In assume method

# Find the mean daily expenditure on food by a suitable MIU

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