Q.

Percentage of gold in 21.6 carat gold is

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a

21.8%

b

90%

c

10%

d

70%

answer is B.

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Detailed Solution

21.6 caratgold contains 21.6 parts of gold in 24 parts by weight of alloy.∴% of gold in 21.6 carat gold =21.624×100=90%
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Percentage of gold in 21.6 carat gold is