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An ornament of Gold having $77.5%$ of Gold is of _____ carat.

$(a)\;21.6 \\(b)\;18.6 \\(c)\; 19.2 \\(d)\;20.8 $

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Pure Gold= 24 carat.
$77.5 \%$ Gold $= \large\frac{77.5 \%}{100} $$ \times 24$
$\qquad= 18.6\;carat$
Hence b is the correct answer.
answered Mar 12, 2014 by meena.p
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