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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 ...
Fundraising or fund-raising is the process of seeking and gathering voluntary financial contributions by engaging individuals, businesses, charitable foundations, or governmental agencies. Although fundraising typically refers to efforts to gather money for non-profit organizations, it is sometimes used to refer to the identification and ...
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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]
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