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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 ...
eBay Inc. ( / ˈiːbeɪ / EE-bay, often stylized as ebay or Ebay) is an American multinational e-commerce company based in San Jose, California, that allows users to buy or view items via retail sales through online marketplaces and websites in 190 markets worldwide.
A UPC barcode. The Universal Product Code (UPC or UPC code) is a barcode symbology that is used worldwide for tracking trade items in stores.. The chosen symbology has bars (or spaces) of exactly 1, 2, 3, or 4 units wide each; each decimal digit to be encoded consists of two bars and two spaces chosen to have a total width of 7 units, in both an "even" and an "odd" parity form, which enables ...
By 2055, the breakdown is estimated to be 48% non-Hispanic white, 24% Hispanic, 16% Black, and 14% Asian. [198] As of 2015, 14% of the United States' population is foreign born, compared to just 5% in 1965. Nearly 39 million immigrants have come to the U.S. since 1965, with most coming from Asia and Latin America.
A large number of date cultivars and varieties emerged through history of its cultivation, but the exact number is difficult to assess. Hussain and El-Zeid [30] (1975) have reported 400 varieties, while Nixon [31] (1954) named around 250. Most of those are limited to a particular region, and only a few dozen have attained broader commercial ...
The educational attainment of the U.S. population refers to the highest level of education completed. [2] The educational attainment of the U.S. population is similar to that of many other industrialized countries with the vast majority of the population having completed secondary education and a rising number of college graduates that ...
The current average interest rate for a 30-year fixed mortgage is 6.56% for purchase and 6.58% for refinance — down 29 basis points from 6.85% for purchase and 31 basis points from 6.89% for ...
Deepwater Horizon was an ultra-deepwater, dynamically positioned, semi-submersible offshore drilling rig [7] owned by Transocean and operated by the BP company. On April 20, 2010, while drilling in the Gulf of Mexico at the Macondo Prospect, a blowout caused an explosion on the rig that killed 11 crewmen and ignited a fireball visible from 40 miles (64 km) away. [8]