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Mathematics, 28.01.2020 05:31 tatia65

Which one of the following statements expresses a true proportion?
a. 2: 1 = 1: 2
b. 7: 9 = 8: 9
c. 54: 9 = 6: 3
d. 3.4 = 9: 12

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Which one of the following statements expresses a true proportion?
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