the ratio of pure gold in 24 carat gold is
Fineness Various ways of expressing fineness have been used and two remain in common use: millesimal fineness expressed in units of parts per 1,000[1] and karats used only for gold. Karats measure the parts per 24, so that 18 karat =  18⁄24 = 75% and 24 karat gold is considered 100% gold.[2]
Gold Gold is a chemical element with symbol Au (from Latin: aurum) and atomic number 79. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental (native) form, as nuggets or grains, in rocks, in veins, and in alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum) and also naturally alloyed with copper and palladium. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides).
Standard deviation Let X be a random variable with mean value Î¼:
All that glitters is not gold While early expressions of the idea are known from at least the 12th century, the current saying is derived from a 16th century line by William Shakespeare.
Bull riding The flank strap
Classic car Cars 20 years and older typically fall into the classic class.