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Bertrand's box paradox is a veridical paradox in elementary probability theory. It was first posed by Joseph Bertrand in his 1889 work Calcul des Probabilités . There are three boxes: a box containing two gold coins, a box containing two silver coins, a box containing one gold coin and one silver coin. Choose a box at random.
The Chinese Gold Panda ( simplified Chinese: 熊猫金币; traditional Chinese: 熊貓金幣; pinyin: xióng māo jīn bì) is a series of gold bullion coins issued by the People's Republic of China. The Official Mint of the People's Republic of China introduced the panda gold bullion coins in 1982. [ 1] The panda design changes every year ...
A sobriety coin is a token given to Alcoholics Anonymous or other twelve-step program members representing the amount of time the member has remained sober. It is traditionally a medallion the size of a poker chip, 34 mm (1.34 in) (standard) or 39 mm (1.5 in) in diameter. In other twelve-step programs it is to mark time abstaining from whatever ...
The America the Beautiful silver bullion coins comprise a series of silver bullion coins with a face value of a quarter dollar. The coins contain five troy ounces of silver, making them the largest silver bullion coins ever issued by the United States Mint. The design of the coins duplicates exactly—though enlarged—each of the America the ...
Gold certificate (United States) Gold certificates were issued by the United States Treasury as a form of representative money from 1865 to 1933. While the United States observed a gold standard, the certificates offered a more convenient way to pay in gold than the use of coins. General public ownership of gold certificates was outlawed in ...
1927-D St Gaudens Double Eagle – When President Roosevelt recalled all gold coins in 1933, about 180,000 Double Eagles were in circulation. Today, there exists 11 to 15 in collectors’ hands.
U.S. coins produced from 1838 through 1933 were made with 90% gold alloyed with 10% copper, [49] while U.K. crown gold coins were minted with a gold proportion of 22 parts to 24 (91 + 2 ⁄ 3 %). These lower gold ratios contrast to many 99.9% fine gold bullion coins minted in modern times since older coins were intended for circulation while ...
A double eagle is a gold coin of the United States with a denomination of $20. [1] (Its gold content of 0.9675 troy ounces [30.09 g] was worth $20 at the 1849 official price of $20.67/ozt.) The coins are 34 mm × 2 mm and are made from a 90% gold (0.900 fine or 21.6 kt) and 10% copper alloy and have a total weight of 1.0750 troy ounces (1.1794 ...
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