A. 2 : 5
B. 3 : 5
C. 4 : 5
D. 7 : 5
Let the third number be z
First number = 120% of z = 120z/100 = 6z/5
Second number = 150% of z = 150z/100 = 3z/2
Ratio of these two numbers = 6z/5 : 3z/2 = 12z : 15z = 4 : 5
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