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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 ...
The first documented use of the phrase "United States of America" is a letter from January 2, 1776. Stephen Moylan, a Continental Army aide to General George Washington, wrote to Joseph Reed, Washington's aide-de-camp, seeking to go "with full and ample powers from the United States of America to Spain" to seek assistance in the Revolutionary War effort.
Coupon. In marketing, a coupon is a ticket or document that can be redeemed for a financial discount or rebate when purchasing a product . Customarily, coupons are issued by manufacturers of consumer packaged goods [1] or by retailers, to be used in retail stores as a part of sales promotions. They are often widely distributed through mail ...
The states and territories included in the United States Census Bureau 's statistics for the United States population, ethnicity, and most other categories include the 50 states and Washington, D.C. Separate statistics are maintained for the five permanently inhabited territories of the United States: Puerto Rico, Guam, the U.S. Virgin Islands ...
Chico ( / ˈtʃiːkoʊ / CHEE-koh; Spanish for "little") [ 9][ 10] is the most populous city in Butte County, California, United States. Located in the Sacramento Valley region of Northern California, the city had a population of 101,475 in the 2020 census, an increase from 86,187 in the 2010 Census. Chico is the cultural and economic center of ...
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Robert E. Lee. Robert Edward Lee (January 19, 1807 – October 12, 1870) was a Confederate general during the American Civil War, toward the end of which he was appointed the overall commander of the Confederate States Army. He led the Army of Northern Virginia —the Confederacy's most powerful army—from 1862 until its surrender in 1865 ...
"Glacial acetic acid" is a name for water-free acetic acid. Similar to the German name "Eisessig" ("ice vinegar"), the name comes from the solid ice-like crystals that form with agitation, slightly below room temperature at 16.6 °C (61.9 °F). Acetic acid can never be truly water-free in an atmosphere that contains water, so the presence of 0. ...