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State which of the following are proportions. (i) 2 : 3 :: 6 : 9 (ii) 1 : 3 :: 4 : 15 (iii) 3 : 5 :: 6 : 15 (iv) 7 : 9 :: 14 : 18 |
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Answer» (i) 2 × 9 = 3 × 6 18 = 18 It is a proportion (ii) 1 × 15 ≠ 3 × 4 It is not a proportion (iii) 3 × 15 ≠ 5 × 6 ∴not a proportion (iv) 7 × 18 = 9 × 14 126 = 126 It is a proportion |
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