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  2. Coupon collector's problem - Wikipedia

    en.wikipedia.org/wiki/Coupon_collector's_problem

    Graph of number of coupons, n vs the expected number of trials (i.e., time) needed to collect them all, E (T ) In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests.

  3. Component (graph theory) - Wikipedia

    en.wikipedia.org/wiki/Component_(graph_theory)

    Component (graph theory) In graph theory, a component of an undirected graph is a connected subgraph that is not part of any larger connected subgraph. The components of any graph partition its vertices into disjoint sets, and are the induced subgraphs of those sets. A graph that is itself connected has exactly one component, consisting of the ...

  4. File:Coupon collector problem.svg - Wikipedia

    en.wikipedia.org/wiki/File:Coupon_collector...

    Graphs of n vs E(T) in the coupon collector's problem: Image title: Graphs of the number of coupons, n vs the expected number of tries to collect them, E(T) = ceiling(n H(n)) in the coupon collector's problem, drawn by CMG Lee. Width: 100%: Height: 100%

  5. Paper Money Value by Serial Numbers: Determine Your ... - AOL

    www.aol.com/paper-money-value-serial-numbers...

    On eBay, these kinds of bills can sell for anywhere from $10 to $300. The lower the serial number, the more valuable the currency is considered to be; a bill with the serial number 00000001 could ...

  6. Dirty price - Wikipedia

    en.wikipedia.org/wiki/Dirty_price

    The accrued interest is based on the day count convention, coupon rate, and number of days from the preceding coupon payment date. [2] The clean price more closely reflects changes in value due to issuer risk and changes in the structure of interest rates. Its graph is smoother than that of the dirty price.

  7. How long can a debt collector pursue old debt?

    www.aol.com/finance/long-debt-collector-pursue...

    Rather, ask for the debt collection notice they're required to give you within a 5 day period. The amount of time that a debt collector can legally pursue old debt varies by state and type of debt ...

  8. Harmonic series (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Harmonic_series_(mathematics)

    Because it is a divergent series, it should be interpreted as a formal sum, an abstract mathematical expression combining the unit fractions, rather than as something that can be evaluated to a numeric value. There are many different proofs of the divergence of the harmonic series, surveyed in a 2006 paper by S. J. Kifowit and T. A. Stamps. [13]

  9. Collectibles You Probably Tossed That Are Now Worth a Fortune

    www.aol.com/22-collectibles-probably-tossed-now...

    Even old blue jeans can have collector's value, if you have the right pair. Levi's 501 jeans were first introduced in 1954, and a mint-condition pair of those first-edition 501 jeans can sell for ...