alleryWhich pair of ratios forms a proportion?
A2:3 and 3:4
B3:5 and 5:7
C2:3 and 8:12
D4:5 and 8:9
Answer & Solution
Correct answer: C. 2:3 and 8:12
1. Two ratios form a proportion when they are equal.
2. 8:12 reduces by 4 to 2:3.
3. The other pairs reduce to different ratios.
_Source: Wikipedia, Ratio, lead section_
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