Abox is filled with 13 yellow cards, 5 red cards, and 2 green cards. a card is chosen at random from the box. what is the probability that it is a yellow or a green card? write your answer as a fraction in simplest form.

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry. how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.