Gujarat BoardEnglish MediumSTD 7MATHSRatio and Proportion1 Mark
Question
Mean proportional between 0.4 and 0.9 is .6.
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Answer
True. Solution: Suppose that the men proportional is x Then, 0.4 : x :: x : 0.9 ⇒ 0.9 × 0.4 = x × x (Product of extremes = Product of means) ⇒ x² = 0.36 ⇒ x = 0.6
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