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  2. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    The event that all 23 people have different birthdays is the same as the event that person 2 does not have the same birthday as person 1, and that person 3 does not have the same birthday as either person 1 or person 2, and so on, and finally that person 23 does not have the same birthday as any of persons 1 through 22. Let these events be ...

  3. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr or 3 σ, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean ...

  4. Cube (algebra) - Wikipedia

    en.wikipedia.org/wiki/Cube_(algebra)

    y = x 3 for values of 1 ≤ x ≤ 25.. In arithmetic and algebra, the cube of a number n is its third power, that is, the result of multiplying three instances of n together. The cube of a number n is denoted n 3, using a superscript 3, [a] for example 2 3 = 8.

  5. Islam - Wikipedia

    en.wikipedia.org/wiki/Islam

    In Arabic, Islam (Arabic: إسلام, lit. 'submission [to God]') [11] [12] [13] is the verbal noun of Form IV originating from the verb سلم (salama), from the triliteral root س-ل-م (), which forms a large class of words mostly relating to concepts of submission, safeness, and peace. [14]

  6. Ethiopia - Wikipedia

    en.wikipedia.org/wiki/Ethiopia

    The remaining electrical power was generated from fossil fuels (8.3%) and renewable sources (3.6%). The electrification rate for the total population in 2016 was 42%, with 85% coverage in urban areas and 26% coverage in rural areas.

  7. Iran - Wikipedia

    en.wikipedia.org/wiki/Iran

    Iran, [a] [b] officially the Islamic Republic of Iran (IRI) [c] and also known as Persia, [d] is a country in West Asia.It borders Turkey to the northwest and Iraq to the west, Azerbaijan, Armenia, the Caspian Sea, and Turkmenistan to the north, Afghanistan to the east, Pakistan to the southeast, the Gulf of Oman and the Persian Gulf to the south.

  8. The Holocaust - Wikipedia

    en.wikipedia.org/wiki/The_Holocaust

    The Holocaust (/ ˈ h ɒ l ə k ɔː s t / ⓘ), [1] known in Hebrew as the Shoah (שואה), was the genocide of European Jews during World War II.Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe, around two-thirds of Europe's Jewish population.

  9. Bill Gates - Wikipedia

    en.wikipedia.org/wiki/Bill_Gates

    The 66,000-square-foot (6,100 m 2) estate has a 60-foot (18 m) swimming pool with an underwater music system, as well as a 2,500-square-foot (230 m 2) gym and a 1,000-square-foot (93 m 2) dining room. [194] On May 3, 2021, the couple announced their decision to divorce after more than 27 years of marriage.