Question

$18$ carat gold contains

• A. $18\%$ gold
• B. $24\%$ gold
• C. $75\%$ gold
• D. $60\%$ gold

Answer 1

Answer: (C)

The weight of gold in jewellery is expressed in carats. It simply implies the number of parts by weight of gold in $24$ parts by weight of the alloy.
Pure gold is $24$ carats. $18$ carat gold means that it contains $18$ parts by weight of pure gold in $24$ parts by weight of the alloy.
Percentage of gold $=\frac{18}{24}\times 100$
Percentage of gold $=75\%$