If 2 : 4 and 3 : 6 are in proportion, then what is the proportion of 4: 2?

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Solution

According to invertendo property of proportion
if a : b = c : d, then b : a = d : c. (1 Mark)
Here 2 : 4 = 3 : 6 (given)
4 : 2 = 2 : 1 = 6 : 3 (1 Mark)

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