A drawer contains two pairs of red socks, three pairs of yellow socks, and one pair of black socks. One sock
is taken from the drawer and put back after checking its
color. A second sock is then taken out. What is the
probability that the first and the second are yellow?

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.