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On the average 800 pounds of valuable oxides are obtained from every 2 tons of ore mined.What is the ratio of valuable oxides to other material in 100 tons of ore ?

a. 1:400
b. 1:5
c. 1:4
d. 2:1
e. 4:1

please answer and explain

  • math -

    800/2 = x/100

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