Discussion
Two numbers are respectively 20% and 50% more than a third number. These two numbers are in the ratio
Answer: B
The two numbers are in the ratio 4 : 5.
Take the third number as 100. The first is 20% more, 120, and the second 50% more, 150:
\[ 120 : 150 = 4 : 5 \]
2 : 5 compares the percentage increases themselves, which ignores the common base, and 6 : 7 and 3 : 5 do not follow.
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