German South West African Mark the gold content of the British Pound Sterling was 7.3224 grams, while the gold content of 20 marks was 7.168 grams. According to Gresham's Law, "bad money drives out good", so the "bad" Mark replaced the "good" British Pound Sterling. In 1901, the German Mark became the official currency of German South West Africa, hence replacing the 20 and 5 mark denominations of the German South West African Mark, for which they were also demonetized (although, they continued use in the metropolis of German South West Africa until 1907). In 1923, the coins of the German South West African Mark
Bad Girl Good Girl debut performance on July 1, 2010, with "Bad Girl Good Girl" on M.net M! Countdown. They were number one for the first time on M! Countdown on July 22. Miss A became number one again on KBS Music Bank the following day on July 23 and on SBS Inkigayo on August 1. "Bad Girl Good Girl" was awarded Song Of The Month on Cyworld, one of the biggest Korean music portals. Bad Girl Good Girl "Bad Girl Good Girl" is a song recorded by K-pop girl group Miss A for their debut EP "Bad But Good". The song served as