The probability of drawing a yellow or green marble out of a bag containing 3 blue,2 green,8 yellow,4 red, and 3 orange marbles

What is the volume of this container?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

What is the solution for 6 - 7/8? explain the steps.