Arithmetichard · Past Paper
If 20% of (A + B) = 50% of (A - B), find the ratio of A to B.
A3:7
B7:3
C5:2
D2:5
✓ Correct Answer: B — 7:3
0.2(A+B) = 0.5(A-B) => 2A+2B = 5A-5B => 7B = 3A => A/B = 7/3.
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