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Graph of number of coupons, n vs the expected number of trials (i.e., time) needed to collect them all, E (T ) In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests.
General Electric in Schenectady, New York, aerial view, 1896 Plan of Schenectady plant, 1896 [19] General Electric Building at 570 Lexington Avenue, New York. During 1889, Thomas Edison (1847–1931) had business interests in many electricity-related companies, including Edison Lamp Company, a lamp manufacturer in East Newark, New Jersey; Edison Machine Works, a manufacturer of dynamos and ...
The Kamov Ka-50 "Black Shark" (Russian: Чёрная акула, romanized: Chyornaya akula, English: kitefin shark), NATO reporting name Hokum A, is a Soviet/Russian single-seat attack helicopter with the distinctive coaxial rotor system of the Kamov design bureau.
In digital electronics, signals are used in rectangular waveform which are represented by logic 1 and logic 0. Logic 1 stands for presence of an electric pulse and 0 for absence of an electric pulse. For example, a signal (10101010) has 50% duty cycle, because the pulse remains high for 1/2 of the period or low for 1/2 of the period.
In Australia, smallpox was introduced by European settlers in 1789 devastating the Australian Aboriginal population, killing an estimated 50% of those infected with the disease during the first decades of colonisation. [107] In the early 1800s, measles, smallpox and intertribal warfare killed an estimated 20,000 New Zealand Māori. [108]
The 1% Club is an American game show, with its setup identically based on the British game show of the same name.Contestants are given a very short amount of time to solve brain teaser questions, with questions getting significantly more difficult as the game continues, as statistically a progressively smaller percentage of people, according to the producers, answered each subsequent question ...