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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. ISO 3166-1 - Wikipedia

   en.wikipedia.org/wiki/ISO_3166-1

   ISO 3166-1. ISO 3166-1 (Codes for the representation of names of countries and their subdivisions – Part 1: Country codes) is a standard defining codes for the names of countries, dependent territories, and special areas of geographical interest. It is the first part of the ISO 3166 standard published by the International Organization for ...

4. Why are Walmart's clothes so good right now? - AOL

   www.aol.com/lifestyle/why-are-walmarts-clothes...

   These aren't just pieces to buy when you're on a budget, they're pieces to buy because you really, really want to wear them.

5. Toll-free telephone numbers in the North American Numbering ...

   en.wikipedia.org/wiki/Toll-free_telephone...

   Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.

6. List of HTTP status codes - Wikipedia

   en.wikipedia.org/wiki/List_of_HTTP_status_codes

   An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.

7. Wasn't polio wiped out? Why it is still a problem in some ...

   www.aol.com/lifestyle/wasnt-polio-wiped-why...

   August 28, 2024 at 3:39 PM. LONDON (AP) — Polio was eliminated from most parts of the world as part of a decadeslong effort by the World Health Organization and partners to wipe out the disease ...