The percentage of gold present in $20$ carat gold is

100

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73.86

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50

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83.33

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Solution

The correct option is C $83.33$
Atomic mass of gold(Au) = 197g
Now weight of gold in 24 carat = 197g
Therefore weight of gold in 20 carat = $\frac{20 \times 197}{24}$ = 164.16g
%age of gold in 20 carat = $\frac{164.16}{197} \times 100$ = 83.33%

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