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Civilian rationing: A shopkeeper cancels the coupons in a British housewife's ration book in 1943. Rationing was introduced temporarily by the British government several times during the 20th century, during and immediately after a war.
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 ...
History. The concept of "buy one, get one free" was devised in the 18th century by retail entrepreneur Josiah Wedgwood. [2][3] This technique is commonly known in the marketing industry by the acronym BOGOF, or simply BOGO. [4][5]
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The military was the true priority, with the 10% of the population in the armed forces allotted 30% of grain and 60% of meat supplies, in addition to foodstuffs looted from the occupied territories. Even as a food crisis loomed on the eve of the armistice, the army built up a reserve of 1.5 million tons of grain (equivalent to 7 months of pre ...
The original name of the WorldPerks program was the Northwest Orient Airlines Free Flight Plan, which began in 1981. [77] The original program used paper coupons and gave credit for flight segments. Upon renaming the program to "WorldPerks" in 1986, a mileage-based system was used.
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