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Coupon collector's problem. 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 ...
A school voucher, also called an education voucher in a voucher system, is a certificate of government funding for students at schools chosen by themselves or their parents. Funding is usually for a particular year, term, or semester. In some countries, states, or local jurisdictions, the voucher can be used to cover or reimburse home schooling ...
The mathematical analysis of the problem reveals that the expected number of trials needed grows as O(nlog(n)). For example, when n = 50 it takes about 225 samples to collect all 50 coupons. Although the O-notation is correct as it is, I think it would be better to be consistent with the following article and write n ln n + \gamma n + O(1).
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Crowdfunding. Crowdfunding is the practice of funding a project or venture by raising money from a large number of people, typically via the internet. [ 1][ 2] Crowdfunding is a form of crowdsourcing and alternative finance. In 2015, over US$ 34 billion was raised worldwide by crowdfunding. [ 3]
Print emails, attachments, and websites. Save a hard copy of important emails, email attachments, and websites by printing them. When you print an email, only the text will show. Attachments, such as pictures or documents, need to be downloaded and printed separately. Print an email
Barnes & Noble Nook. Barnes & Noble Nook (styled NOOK) is a suite of e-book readers developed by the company, [ 88] based on the Android platform. The first device was announced in the United States on October 20, 2009, and was released November 30, 2009, for $259. [ 89]