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2. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   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 ...

3. Buy one, get one free - Wikipedia

   en.wikipedia.org/wiki/Buy_one,_get_one_free

   Buy one, get one free. " Buy one, get one free " or " two for the price of one " is a common form of sales promotion. Economist Alex Tabarrok has argued that the success of this promotion lies in the fact that consumers value the first unit significantly more than the second one. So compared to a seemingly equivalent "Half price off" promotion ...

4. Gamma-ray burst - Wikipedia

   en.wikipedia.org/wiki/Gamma-ray_burst

   These account for about 30% of gamma-ray bursts, but until 2005, no afterglow had been successfully detected from any short event and little was known about their origins. Since then, several dozen short gamma-ray burst afterglows have been detected and localized, several of which are associated with regions of little or no star formation, such ...

5. Phase-out of incandescent light bulbs - Wikipedia

   en.wikipedia.org/wiki/Phase-out_of_incandescent...

   According to this source, 1 November 2011 to 30 September 2012 will be a transitional period and as of 1 October 2012, imports and sales of ordinary incandescent bulbs of 100 watts or more will be prohibited. The first phase will be followed by a ban on 60-watt-and-higher incandescent light bulbs starting in October 2014.

6. Best Buy posts disappointing sales for Q1 as consumers pull ...

   www.aol.com/finance/best-buy-q1-earnings-preview...

   Online sales dropped 6.1% in the quarter; it made up 30.8% of total US revenue, slightly more than the 30.5% from a year ago. The company's service category, like its membership offerings, helped ...

7. Beauty and the Beast (1991 film) - Wikipedia

   en.wikipedia.org/wiki/Beauty_and_the_Beast_(1991...

   It was the second-best-selling Blu-ray of 2010, behind Avatar. A two-disc DVD edition was released on November 23, 2010. A five-disc combo pack, featuring Blu-ray 3D, Blu-ray 2D, DVD and a digital copy, was released on October 4, 2011. The 3D combo pack is identical to the original Diamond Edition, except for the added 3D disc and digital copy.