If 10% of x = 20% of y, then x:y is equal to:
A). 1:2
B). 2:1
C). 5:1
D). 10:1
2:1
10% of x = 20% of y
10x/100 = 20y/100 => x/10 = y/5
x/y = 10/5 = 2/1
x:y = 2:1.
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