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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

   The 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, they may only buy one item at half price, because the value they attach to the second unit is lower than even the discounted price.

4. Alexander Graham Bell - Wikipedia

   en.wikipedia.org/wiki/Alexander_Graham_Bell

   a Boston University (see below). b See below. c Two died soon after birth. Alexander Graham Bell (/ ˈɡreɪ.əm /, born Alexander Bell; March 3, 1847 – August 2, 1922) [4] was a Scottish-born [N 1] Canadian-American inventor, scientist, and engineer who is credited with patenting the first practical telephone.

5. Where to shop today's best sales: 25% off an iPad, 20% off ...

   www.aol.com/lifestyle/where-to-shop-todays-best...

   Le Creuset Signature Round Dutch Oven, 5.5 Quart. Cook like Ina Garten this fall and winter with the queen's favorite 5.5-quart Dutch oven, now 20% off at Sur La Table. You can score the stunner ...

6. Shop the best deals during Walmart's weekly sale: Save on ...

   www.aol.com/lifestyle/shop-the-best-deals-during...

   Alrocket Air Purifier. $36 $40 Save $4. Nowadays it seems like allergy season is every season, and having an air purifier around can help mitigate the sniffles and itchy eyes. This one boasts a ...

7. 7 secret deals for Amazon Prime members only - AOL

   www.aol.com/lifestyle/7-secret-deals-for-amazon...

   Peakeep Digital Alarm Clock. $10 $20. Save $10 with Prime and coupon. Need a simple bedside alarm clock that's easy to read, both up close and from afar? This one will only run you $10 if you're a ...