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i.e.,ppm),thedatal b ind out the concentration of SO, in the air (in parts per million,ras collected for 30 localities in a certain city and is presented below:FrequencyConcentration of SO, (in ppm)0:00 0.040.04 0.080.08 - 0.120.12 -0.160.16 0.200.20 024442Findthe mean concentration of So, in the air.

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