SOLUTION: Three harmful pollutants were measured by a consumer group in the city. The total sample contained 15 parts per million (ppm) of three harmful pollutants. The amount of the first p

Question 401180: Three harmful pollutants were measured by a consumer group in the city. The total sample contained 15 parts per million (ppm) of three harmful pollutants. The amount of the first pollutant was double the second. The amount of the third pollutant was 75% of the second. How many parts per million of each pollutant were found?
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Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Let s=the 2nd.
2s+s+.75s=15
3.75s=15
s=4
1st=8
3rd=3
.
Ed
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