Mean proportion of 2 and 8 is ..........

Mean proportion of 2 and 8 is .................

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If 1, 2, 3 and x\ are in proportion, then x = .................
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Ratio of Rs. 2 and 50 paise and Rs. 3 and 75 paise is .............
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Mean proportion of 2 and 8 is .................
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If a : b=4:5\ a n d\ b : c=2:3, then a : c=\ .................
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If 2x=5y , then x: y= .................
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