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In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be bought ...
Anonymous broadside, Angus, Newcastle, 1774–1825. "The Twelve Days of Christmas" is a cumulative song, meaning that each verse is built on top of the previous verses. There are twelve verses, each describing a gift given by "my true love" on one of the twelve days of Christmas. There are many variations in the lyrics.
These include New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, and Christmas. Businesses often close or grant paid time off for New Year's Eve, Christmas Eve, and the Day after Thanksgiving, but none of these are federal holidays. Other federal holidays are less widely observed by business.
Smallpox was an infectious disease caused by variola virus (often called smallpox virus), which belongs to the genus Orthopoxvirus. [7] [11] The last naturally occurring case was diagnosed in October 1977, and the World Health Organization (WHO) certified the global eradication of the disease in 1980, [10] making smallpox the only human disease ...
Asexuality is the lack of sexual attraction to others, or low or absent interest in or desire for sexual activity. [1] [2] [3] It may be considered a sexual orientation or the lack thereof. [4] [5] [6] It may also be categorized more widely, to include a broad spectrum of asexual sub-identities. [7] [8]
Honshu contains Japan's highest mountain, Mount Fuji, and its largest lake, Lake Biwa. Most of Japan's industry is located in a belt running along Honshu's southern coast, from Tokyo to Nagoya, Kyōto, Osaka, Kobe, and Hiroshima; by contrast, the economy along the northwestern Sea of Japan coast is largely based on fishing and agriculture.