Which of the following are in proportion? 1, 3, 11, 22 ; 2, 3, 20, 30 ; 3, 4, 15, 18 ; 2, 5, 40, 80
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Answer:
2,3,20,30 is an proportion
2:3 and 20:30
2÷3=0.66666666667
2÷3=0.66666666667
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