Three gas cans sit in a garage. The first contains a gas-oil mixture that is 95% gas. The second contains a gas-oil mixture that is 75% gas. The third is empty. If a gas-oil mixture that is 80% gas is to be mixed in the empty can by combining some of the original two mixtures, then what ratio of mixture from the first can to mixture from the second can should be added to the third can?
A)1:3
B)1:2
C)1:1
D)2:1
E)3:1
A)1:3
B)1:2
C)1:1
D)2:1
E)3:1
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