При штамповке изделий бывает в среднем 20% брака. Для контроля отобрано 8 изделий. Найти: а) вероятность того, что два изделия окажутся бракованными; б) наивероятнейшее число бракованных изделий; в) вероятность наивероятнейшего числа бракованных изделий.

При штамповке изделий бывает в среднем 20% брака. Для контроля отобрано 8 изделий. Найти: а) вероятность того, что два изделия окажутся бракованными; б) наивероятнейшее число бракованных изделий; в) вероятность наивероятнейшего числа бракованных изделий.
- Предмет:
  Математика
- Автор:
  benji32
- 5 лет назад

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Решение в приложении.
- Автор:
  veronicaljdr
- 5 лет назад
- 0
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Technological civilisation

We are a technological civilisation and culture. Technology has been with humans from the first use of a stone as a tool and it is impossible to separate technology from our life now. This tool use has since developed to an advanced state, where our human culture is dependent upon the technology that surrounds it. Here are some inventions to consider:

According to legend, the wife of Emperor Huangdi developed silk as an industry about 4,700 years ago. Her name was Xilingshi, and she may be the first ever recorded female inventor. People did not bring silkworms to the West until 550 AD as it was a Chinese secret guarded with the threat of death. Eventually two monks smuggled out eggs and mulberry seeds in hollow bamboo canes. China still produces more silk than any other country. 2

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The building of ships seems to have begun in Egypt when the first models were designed 5,000 years ago and evolved to the sailing ships that could move easily with the help of wind. But there is still the mystery of how the first inhabitants of Australia were able to come to that continent 60,000 years ago since they had to cross a stretch of ocean of at least 70 kilometres. This most certainly required some means of ocean travel!

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In 1888, an American inventor, Herman Hollerith, developed the first successful computer, using punched cards and electricity.

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The principle of the laser was first known in 1917, when physicist Albert Einstein described the theory of stimulated emission. However, it was not until the late 1940s that engineers began to use this principle for practical purposes. These included Charles Townes at the Columbia University, Joseph Weber at the University of Maryland and Alexander Prokhorov and Nikolai Basov at the Lebedev Laboratories in Moscow. Both Townes and Prokhorov were later awarded the Nobel Prize for Science in 1964 for their inventions. Today lasers are used, for example, in corrective eye surgery, providing a precise source of heat for cutting tissue.
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