Chartreuse (color) as one of the colors on the Xona.com Color List. Pear is a desaturated chartreuse yellow color that resembles the color of the exterior surface of Anjou or Bartlett pears. Lemon Lime is a fluorescent chartreuse color that refers to a theoretical combination of the two colors of the lemon and lime fruit rinds. Such a name might have been popularized by the advertising of various carbonated soft drinks such as Sprite, 7 Up and Sierra Mist, although all three of these drinks actually appear clear and colorless. Lime is a color that is a representation of the color of
Combination can be written using factorials as formula_2 whenever formula_3, and which is zero when formula_4. The set of all "k"-combinations of a set "S" is often denoted by formula_5. Combinations refer to the combination of "n" things taken "k" at a time without repetition. To refer to combinations in which repetition is allowed, the terms "k"-selection, "k"-multiset, or "k"-combination with repetition are often used. If, in the above example, it were possible to have two of any one kind of fruit there would be 3 more 2-selections: one with two apples, one with two oranges, and one with two pears.