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  2. Coupon collector's problem - Wikipedia

    en.wikipedia.org/wiki/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 than t boxes need to be bought ...

  3. Discounts and allowances - Wikipedia

    en.wikipedia.org/wiki/Discounts_and_allowances

    Discounts and allowances are reductions to a basic price of goods or services.. They can occur anywhere in the distribution channel, modifying either the manufacturer's list price (determined by the manufacturer and often printed on the package), the retail price (set by the retailer and often attached to the product with a sticker), or the list price (which is quoted to a potential buyer ...

  4. The Steam Deck is up to $130 off during the Steam Summer Sale

    www.engadget.com/the-steam-deck-is-up-to-130-off...

    The 64GB model has dropped by 10 percent to $359.10, while the variant with 256GB of faster NVMe storage is down to $449.65, 15 percent off the regular price. The 512GB version, which has an anti ...

  5. Annual effective discount rate - Wikipedia

    en.wikipedia.org/wiki/Annual_effective_discount_rate

    A discount rate applied times over equal subintervals of a year is found from the annual effective rate d as. where is called the annual nominal rate of discount convertible thly. is the force of interest . The rate is always bigger than d because the rate of discount convertible thly is applied in each subinterval to a smaller (already ...

  6. Drop chance probability - Engadget

    www.engadget.com/2010-01-13-drop-chance...

    The formula to calculate your drop chance ( x ) over any given number of runs ( y ) is this: 1 - ( ( 1 - x ) ^ y ) Thus we can learn that if we kill Baron Rivendare 100 times, we have a 63.4% ...

  7. The best power banks and portable chargers for 2024 - Engadget

    www.engadget.com/best-power-bank-143048526.html

    Anker MagGo Power Bank (10K) Best MagSafe-compatible power bank. $90 at Amazon. Anker Nano Battery (Foldable USB-C) Best battery for a partial charge on an Android. $30 at Amazon. BioLite Charge ...

  8. Social discount rate - Wikipedia

    en.wikipedia.org/wiki/Social_discount_rate

    The social discount rate is a reflection of a society's relative valuation on today's well-being versus well-being in the future. The appropriate selection of a social discount rate is crucial for cost–benefit analysis, and has important implications for resource allocations. There is wide diversity in social discount rates, with developed ...

  9. DOJ says Apple's 'complete control' over tap-to-pay ...

    techcrunch.com/2024/03/21/apple-pay-doj-iphone...

    Apple today takes a 0.15% fee on any transaction made via Apple Pay. In 2021, that worked out to $1 billion; by 2022, that grew to $1.9 billion; and in 2023, it’s estimated that the figure more ...